This coming generation is going to really define the difference between the more casual core players and the hardcore core players. As technology increases, the improved effect people see is diminished. Only those who truly look critically at games and take the effort to notice the detail will see the vast differences - everyone else will only notice moderate improvements in the screens.
Also, the difference should be more apparent when you see actual gameplay videos of high profile games running on the UE4 vs those currently on the PS3.