To tell the truth great visuals really don't mean much to me with games: its just the icing on the cake. For example fallout, baldur's gate and alpha centauri, halflife 1 & deus ex 1 all still great games despite having relatively dated graphics whereas this last year has seen quite a few disappointing games with admittedly brilliant graphics, but which have often been very tired, uninspiring repeats, dumbed down (often for cross-platform purposes) but wrapped in lens flair, water reflections and high detail textures.
I always wait to see what the actual game is like in reality and as played by the gaming community when it comes out rather than relying on the developers and journalists saying that it is going to be the 'next big thing' in gaming (they say this about absolutely everything - its part of their job).