Terrible performance? I never notice any slowdown in any of those games, if it does happen it's so fast it' snot an issue but I've never noticed anything. You are entitled to your own opinion but you don't need to make things up to try to bolster your argument.
As far as the memory it's 12GB for the games and 4GB set aside for the OS for a total of 16, that's 3GB more than the One X allows for games.
I don't think we'll ever see 120hz on console, that's never going to be the focus, hell 60hz isn't even a guarantee even with a better CPU.
I know the GPU is primarily what's pushing the resolution but again I'm al for using the techniques that the studios behind those three PS4 exclusives, not only will it be just about as good as native 4K but we'll also have higher end assets.
I have said a few times now I want it to be more than 9.2TF but if it ends up being that it's still going to be a significant jump over what we have now.