Why is it a copy? Remote play existed even on PSP. Now it is only being implemented correctly. I used it on PS3 sometimes, but the lack of campatible games is a killer problem. But it was nice to keep and eye at downloads on PS3, but wasn't a killer feature.
If they make every PS4 game compatible, or at least most of them, it will be more interesting. But I won't use it a lot anyway. Why I will play gorgeous PS4 games on a 5' screen if I have a 40' one? And that TV is only for gaming, so its always available. When I can't play there for some reason, I play Vita games. I'm more interested in the companion app to access extra content in the games using Vita or my tablet. That is a killer feature. But, if Gaikai allow me to play remote games on Vita using the Internet, now that is a killer feature.








