it always depends on the game really, there are games that really benefit from texture details much more than others
but at this stage, I agree that we don't need any more power
Ps4/Xbox1 level is just enough to achieve any kind of depth needed for the game to be enjoyed, from now on, any additional graphical effects are only pleasant to the eye and do not add much as to what extend you enjoy a game
a very similar case with movies, realistic effects do not necessarily make a good movie, plot and acting is more basic
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^