GPU technology has come a long way over the last 5 years, but most AAA game studios want to cross-sell their titles to both the PC and console markets, so practically speaking they’re constrained to only providing as much graphical pizzazz as the current generation of consoles can support. So game graphics tend to take big leaps forward when a new generation of consoles comes out, and then stagnate for years while those consoles live out their life cycle.