Compare the graphical differences between a game that came out in 1995 and one that came out in 2000. For instance, compare the visual differences between Chrono Trigger (1995) on SNES, and Chrono Cross (2000) on PS1. Then compare one that came out in 2005, and compare it to one that came out in 2010. For instance, Battlefield 2 (2005) on PC, and Battlefield: Bad Company 2 (2010) on PC. Not a huge difference. It especially seems like things have slowed down in the last 2-3 years. To me, BioShock 2 doesn't look much better than BioShock.