2007 is the year where games pretty much hit graphical perfection for me. Halo 3, CoD 4, BioShock, all absolutely stellar looking games, and all of them hold up damned well today (well, except for BS's lip-synching, that was always a bit off). All the advancements since then, sure, they've been very nice, but they've never added too much. We've gotten to a point of diminishing returns, where major upgrades in graphics lead to only minute differences in visuals.