Nope. backwards compatibility doesn't interest me as I have a PS3 and can't think of many, if any games I still care to play on it.

I could be completely wrong but I thought a lot of CPU driven aspects of games are not that easily scalable (unlike graphics) so we probably wouldn't see much difference in games without GPU also being beefed up. I was once in favour of sony/microsoft doing a mid gen upgrade, but I'm now inclined for the the new generation to begin in 2018 so there will be no point of that or this upgraded PS4

The Cell BE does NOT have hardware acceleration for H.264, it is the SpursEngine that DOES have H.264 acceleration ... (Big Difference!) 

Just because GeForce 7800 is some old turd doesn't mean it is a known subset of GCN and using the Cell BE for physics simulation would have drawbacks such as synchronization overheads and other caveats of the Cell ...

How the games look like mean nothing to me when developers left and right claim Cell to be junk ... 

Even with all the man power there's no way to know if they could even translate it to graphical effects ...

For $100 more at launch, yes. I still use PS3 and the idea of playing those games with a much better system and UI appeals to me.

But by next year I do not see myself playing any PS3 games so at this point in time no it wouldn't be a worthwhile investment.

No. Haven't been interested in enough in PS3 games. Most that I'm interested in are available on PS now, in PS4 upgrades or on PC. PS+ makes this somewhat interesting but not nearly enough.

Not for 100 dollar price difference. Maybe 50.

lol. That was my reaction. A PS4 like this wouldn't be sold for $450, or even $500. If they shoved a PS3 in a PS4 as they would have to in order to get backwards compatibility, the thing would cost at least $600 and sell like garbage and resemble a hideous behemoth. A ridiculous price for the sake of giving backwards compatibility is the major reason that the PS3 suffered until the Slim re-launch (among extraneous price boosts from bleeding edge bluray tech and otherwise). There's a good reason Sony hasn't and won't shoot themselves in the foot yet again this way.

Besides that, I'm reasonably certain OP underestimates what would be necessary to actually provide PS3 backwards compatibility.

No. The best thing Sony can do is unlock games you own and stream the game through PlayStation Now. So for example, if you own uncharted disc and the game is on playstion now. Insert your disk and play the ps now stream version free.

1. Yes it is ...

2. You wouldn't know since your not a developer ...

3. What do the developers behind Evolve have to do with this ? Naughty Dog and Geurilla Games aren't the only ones when you have other guys like Crytek and Epic Games ... 

4. What THEY can do doesn't tell if the Cell can be leveraged in this case. Hell, the Jaguar APUs are probably a better idea for physics simulation than the poor Cell when all things are considered ...

No, what would be the point?