ME2 is even more groundbreaking than the original was. The way it gets you to care about the characters is really impressive. By the end of the game I was fully invested in the story and the characters, more-so than in any book or movie. when a game can do that it is revolutionary.
the combat is fun and visceral, and the graphics (i played it on PC) are the best i've ever seen. the lighting and shadows are dynamic and well done, I'd never realized how much normal games have been lacking in that department.
if this is truly the future of video games, then the future looks good!