I tried the Fifa demo, and I must say that it doesn't jump out at you, in terms of being "next-gen". I have a 50 inch plasma, and on that thing, the standard camera angle is too far away to really see a dramatic difference. I tried switching to the broadcast camera angle, and it was a little bit better, but I don't really like playing with that camera angle. I've got a 126 inch screen in my other room, but the projector is 720p. Just not sure if the PS4 would be somewhat wasted on it. I've left the PS4 on my 1080p plasma in the living room, even though it's only a 50 incher.
If I had a 1080p projector, I'm thinking Fifa would look pretty good, but on a 50 inch plasma it's underwhelming. You really need a big 70 inch TV to make this game look next-gen.
The replays do look nice, but all the people that were at my house that saw this game thought it was one of the weakest PS4 games that they've seen.