We've been speculating and spilling them for months, but Sony has finally revealed, at least partially, the basic spec sheet for the PS4. It's... very basic, but as you can see, there's 8GB of memory, a hard drive and an x86 CPU.
We knew many of these specs (and then some) earlier, but there was always conjecture over whether the 8GB of memory found on the dev kits would be reduced on retail models. Nope!
UPDATE: Sony has released a lot more info on the system's specs, which you can see right here. Some highlights: