I was a bit curious earlier in regard to what the first "laptop" computer was and who invented it, so I did a bit of digging. Evidently, the first laptop commercial laptop was the "Osborne 1," which was invented by the Osborne Computer Corporation in 1981. In 1981 terms, this hulk of a laptop weighing 24.5lbs priced out at $1,795. Specwise, it came with a Zilog 4MHz CPU, 64K of RAM, a 5 inch monitor, and 2 5 and a quarter inch floppy drives. As you will see if you click on the link below, it basically looks like a fancy electric typewriter, but hey, we had to start somewhere.
Yeah Osborne was definitely not a laptop, you might be able to put it on your lap, but so could I with an Apple II, TRS-80 or even IBM PC original.
First thing that even looked like a Laptop I had was a different type of convertible that one could almost pretend was a laptop (I think this is the one Fihart remembers); http://oldcomputers.net/ibm5140.html
We also had other things like small computer like / calculator-like devices from Tandy and Psion, owned a few of those, all that would be easily laptop-usable prior to the first PC in the current laptop form.
Well, I was going for "laptop" in an age old sense, i.e. a portable computer. I guess I should have been more specific. Never the less, it's amazing how things have progressed from suped up typewriter looking machines to the laptops, netbooks, tablets, etc... that we have today.
Heck, it was 1968 (same difference) and it does look a lot like the e-readers that we are seeing today. I wish some would take on the full keyboard like the Dynabook had, but then they'd look like a large Blackberry. Needless to say, the Dynabook appears to have been ahead of its time by 40 years or so.