Played it: Deus Ex: Human Revolution
Whether it's visuals or audio, you'll be hard pressed to find a more sumptuously atmospheric game than Deus Ex: Human Revolution. This is a future of audacious mega-structures, human augmentation, renaissance fashion - and, naturally, a cyberpunk underbelly of lofty goals turned sour. If nothing else, this game is a treat to explore.
Ignoring the second Deus Ex game (a mediocre shooter that might have been well received if not for its supposed heritage), and comparing it to the first, Human Revolution has more satisfying and consistent gameplay, and a tighter, more natural storyline. But the environments of the first game are still much larger and allow for more emergent styles of play. It's a shame that the focus on technically superior graphics above all else is leading to smaller and narrower games, even as platforms increase exponentially in power.
But despite a few hiccups (see also: the out-sourced and utterly incongruous boss fights), this is a first-class game that combines old-school ambition with a more refined sensibility.