PS4 will come and is probably closer than people realize.
It will probably have pad+move as standart controls but most importantly it must have upgrade of GPU.
If they want to push 3D gaming they need machine powerfull enough to make 720@60 fps or better 1080p@60 fps.
Considering such GPUs cost 100$-150$ on todays market it should be realistic for 2011 or 2012.
PROUD MEMBER OF THE PSP RPG FAN CLUB