I wouldn't call the following an epic moment, but here's the most unforgettable gaming moment I had this gen:
The moment I started the first level of Flower, a game that blew me away and suprised me like only very few others before (Dune II, Civilization, Monkey Island, Magic Carpet) in my 19 years of videogaming.
http://www.youtube.com/watch?v=rXYvnjpdPXk