It won't be todays DRAM - DDR4 will be out shortly, one of the reasons DDR3 is/has been rising pricewise, Yes, can call 1600 standard, but as said, it's entry level...1333 is drying up, about 3-4 months ago there were like 300+ options available at the Egg, now it's about 200.....there were over 460 1600 sets now down to 435 or so and shrinking as they sell out of inventory).
With the release of DDR4 (expected this year) the LOWEST is 1600 and initial specs, per JEDEC run up through 3200 sticks, so yes we can fairly accurately see the direction DRAM is headed, lower voltages and higher freq sticks