Buy PS3, is it still the right time?

Will the PS4 be backwards compatible?  So, say if I get a PS4, will I be able to play The Last Of Us on it?

He could get a EVGA Hadron case, and put in a super powerful computer into the small form-factor. Plus he can carry around hundreds of games (assuming he has that many on steam). 

No lol, although they may possibly do a streaming service that they may charge more money for so that you may be able to play old games that you may have to buy again lol. Lots of maybes.

Damn.  I hope the price of the PS3 comes down below $200 soon.