At the end of the 6th gen, gaming was starting to get boring, as I didn't really have friends to play with any more, and faceless people on the internet is kind of lame. The Wii with games like Wii Sports, Mario Kart Wii, and Shuan White Snowboarding: Road Trip have really brought the fun back to gaming. Especially since I can get my wife into playing those kinds of games with me.
I still love more traditional games, but games that really use the Wii Remote, nunchuck and/or balance board in unique and well implemented ways really bring that wow factor. Heck, I even got my mother to play Shaun White with me last week.