If the machines are as powerful as the makers say, then all these games will look good, and perceived differences/"weaknesses" will be little none. The real test is in the hands of the developers, and other specific [new] features.
Either,
1) Developers can be lazy and squeeze generic games out with little effort.
2) Developers will spend sooo much more time & money to make specific objects ridiculously detailed, or output so many objects on the screen. Then everyone will start judging things based on how crowded the screen is, and how detailed each object is.
At least, that's sorta how i see it.