Intel Announces Atom Bay Trail Processor For Tablets
Bay Trail Atom system-on-a-chip processors are quad-core.

Intel has announced new Bay Trail Atom processors for tablets, as well as the 'Lexington' processor for smartphones.
The new Bay Trail Atom system-on-a-chip processors are quad-core and are notably smaller than previous Atoms thanks to a new 22nm design. They boast better "all-day" battery life and greater processing power, which is apparently twice as fast as current Atoms. Quad-core Bay Trail Atoms is currently scheduled for a launch by holiday 2013.
For worldwide markets and budget phones, Intel announced the development of another Atom processor, the 'Lexington'. Intel also announced a smartphone for emerging markets that will sport the Lexington Atom Z2420 w/XMM 6265 chip. The chips are designed for markets including Africa, China, Latin America and Southeast Asia.
The chips boasts speeds of up to 1.2GHz with Hyper-Threading, HD video encoding and decoding (1080p 30fps), camera support with seven-frame burst mode, as well as SGX540 graphics. FM radio, microSD card slot and Intel Wireless Display for playback on TVs are also included.
In other words, they are using the same GPU as my old now defunct Galaxy S.
Even with Medfield, Intel is virtually a non player in the phone space right now. I would have expected them to leverage their 22nm process for mobile SoC's well before then. Unless they have some other great SoC's coming out soon, it seems like they are wasting time.
bay trail is a tablet solution (update to the currently shipping clovertrail), not a phone solution, so not sure why you bought medfield in to this... It has full x86 functionality... (although don't bother trying to run anything needing any real power...)
Intel is still a relatively new player in the SoC market. The first generations of Atoms were not particularly successful but Intel is getting pretty serious about it. The newest Atoms manage to beat some of the newest ARM chips in many benchmarks on both power and performance. I wasn't expecting that considering how much legacy crud x86 CPUs have to waste power on.
Seems like Intel already has some quite decent SoCs, albeit possibly not for 3D mobile gaming.
Scaling back core clocks has little to do with how many cores they can cram on a die - it has more to do with power consumption and heat generation.
Also... the article is rather vague on performance.
Is the 2x performance increase due to the architecture only, or is it because of both architecture and added cores?
If its the former, then you would basically see 2x higher performance due to architecture clock per clock on a single core, and then add 3 more cores to the mix.
If its the latter, then Intel either had to scale back the individual core clocks due to power/thermal constraints.
Reducing the die itself to 22nm (using Silicon - which is SORELY outdated for computer chips) also means cramming more transistors into a smaller area - that alone will create higher thermal footprint (so in this case, using Silicon, the lower you go, the hotter it will get, and Intel will have to continuously make various cutbacks if they insist on using Silicon - which is probably what they will do until they milk it dry - nevermind that we had the ability to use far superior synthetic materials and methods of production for computer construction a long time ago, that would in turn make computers of today look like they were 60 to 100 years old - which they are, seeing how our scientific knowledge and practical application of it is basically by that much ahead of anything we presently use).
4th generation Intel® Core™ processor family (formerly codenamed "Haswell") will enable a broad new range of Ultrabook convertibles, detachables and tablets with all-day battery life; the biggest battery life gain over a previous generation in company's history
4th Generation Intel Core processors provide 3-5 hours of additional battery life when compared to 3rd Generation Intel Core processors, based on measurement of 1080p HD video playback.
Building on the progress first detailed a year ago at CES, Intel unveiled a new low-power Atom™ processor-based platform (formerly "Lexington") and smartphone reference design, targeted at the value smartphone market segment, which industry sources predict could reach 500 million units by 2015. Customers announcing support for the platform include Acer*, Lava International* and Safaricom*.
The new value offering includes many high-end features including the Intel Atom processor Z2420 with Intel Hyper-Threading Technology that can achieve speeds of 1.2 GHz, 1080p hardware-accelerated encode/decode, and support for up to two cameras delivering advanced imaging capabilities, including burst mode that allows people to capture seven pictures in less than a second in 5-megapixel quality. The platform also includes the Intel XMM 6265 HSPA+ modem that offers Dual Sim/Dual Standby capability for cost-conscious consumers.
Skaugen announced today that the company is bringing the low-power line of processors into its existing 3rd generation Intel Core processor family. Available now, these chips will operate as low as 7 watts, allowing manufacturers greater flexibility in thinner, lighter convertible designs...
The 4th generation Intel Core processor family enables true all-day battery life -- representing the most significant battery life capability improvement in Intel history. Skaugen disclosed that new systems are expected to deliver up to 9 hours of continuous battery life
And some more stuff.
Also, Bay Trail = Intel IGP
Lexington (Clover Trail+) = SGX540 or similar.