the best thing for gaming will be interactive holographics, but this is decades away, 3D are just gimmick attempts at trying to give the illusion that your there in the place, but it fails....
They should stick to graphics until such time the graphics can simulate reality at that stage 3D will work....but you know what, I see nothing wrong with playing with a standard dualshock3 10 years from now with perhaps a slight improvement here and there to ergonomics....because some time the design is so good that it just works flawlessly through time, just look at cars, they've had 4 wheels for decades, if it works it works and there's some times no need to change things, simple as that really.