Ok, if you want to play PS3 games why the HELL are you buying a PS4? Shouldn't you just keep playing on your PS3? It's not like having a PS4 makes your PS3 magically disappear... So you'd rather pay for another PS3 inside of your PS4 just so you can play games you can already play?!
If you're referring to games purchased on PSN as "PS3 Games", then it's just a way for people to move forward at the pace that Sony feels is necessary without people feeling like they've just thrown a bunch of money down the drain on very recent purchases. I'm not talking about the hardcore, mom's basement, 16 hours a day gamer.
I'm talking about adults who have other things to spend their money on. Yes, they're "old games". Wowee. I'm not even saying Sony NEEDS to support them. Just don't be shocked when we're not ready to move at your pace and buy "the next greatest thing" that maybe you'll decide to stop supporting in 5 years the next go round.
The thing is that these companies don't want to be selling new platforms at cost or at a loss if people are going to buy them to play games they already own. They want to be selling you new content.
I get that. But mykevermin hit the same point I did. You're going to alienate people and it's going to stunt the growth of the new system. People are laughing at Nintendo because the WiiU has had a rough go of it. But I can almost guarantee both Microsoft and Sony will face the exact same thing. This isn't like moving from the PS2 or Xbox. There is an incredibly expansive online structure now with thousands of digital games, game add-ons, and freaking clothes for your virtual self. People aren't just going to chuck that aside and gleefully start tossing their money down the next rabbit hole.
The "game" has changed very much in the past 7-8 years. I don't think the promise of new software and pretty graphics is going to be enough to convince people to upgrade anymore. The only hope is that these new systems won't cost developers a fortune to make games for...as I think that really took a toll this last generation. Otherwise, we'll probably see more and more developers moving to the digital format....which Sony and Microsoft won't support the following generation.