I'm not gonna lie, so far I think the PS4 fucking sucks and I might return it. I like the controller, if anything, a little less than the DS3. I HATE the UI. To switch between accounts (i admit, i dont do this very frequently, but still), you have to completely log out and then back into the other...why would they make this more complicated than the ps3? I've had two downloads become corrupted. DL speeds are no better than PS3 for me. I had warframe hang on the installing application screen, and had to wait through the whole download (i thought i could play it before the entire thing installed or something, otherwise i'd say nothing) to play it. The primary PS4 thing is just a complication imo.
It seems to me like they tried simplifying the menus so everything is cleaner/looks more streamlined, but in doing so made other things a lot more complicated. Why would they flip the menu (stuff that used to be on the left is now on the right)? I wish they'd have kept it the same, it seemed so much more accessible.
I've played warframe, which sucks, and resogun and contrast are not great either. I've not played any "real" games yet, though. I dunno. I'd like to try killzone and knack before i make any decisions, but so far its not as ZOMG as i though it'd be. :/