My MO tends to be to hate any new stuff until it becomes apparant that I was wrong. It's win-win.
TBH, I doubt I would have got a Wii when we did, had Donna not decided that she needed one, and that we should split the cost. But I have one now, and I still use it pretty often - and it's great for having people round - it's probably the most group friendly console. As for the Wii U, I honestly don't care enough to have bothered forming an opinion yet.
I did like the idea in last weeks Penny Arcade comic though - it's perfect for that "dungeonmaster" type stuff.