Why the PS4 Doesn't Do PS3 Games

[Shuu]

I think it's now up to the publishers of certain games to make sure their old games don't fade away. Lavish packs of "classics" might be the answer, but then it's till a nightmare to change the code to work on the new machines. Remember what a mess Konami made of the Silent Hill HD remake.
Digital distribution would be key in this working.
A thought occures though. If it's such a hassle to remodle a PS3 game for the now more PC-esk PS4, if a given PS3 game was also available on PC or 360, might it be a simpler task to port from those formats to PS4?... would there be some legal hassle with Microsoft if they chose to do that?

 

[Tim Davidson]

Livid.... This makes no sense. GTA V comes out in September which I will buy instantly on PS3. The PS4 comes out in November and I would only afford it if I traded my PS3 in for one which I won't do as I won't be able to play GTA V on it? I think there are a lot of people in this position and I expect this one game (GTA V) will impact people's decisions to buy a PS4 on release. I can see early sales of the PS4 being low.