I'm not a fan of watching sports in general (I don't see the need for commentators to tell me what's going on when I can see it...it doesn't make things exciting or worthwhile IMO), so I won't watch it. The halftime show will probably suck (I've heard it's Madonna and some other schmucks to which I don't listen and for which I don't care, if only because certain retro and modern musicians have low entertainment value IMO), and as far as commercials go, the only one I can recall ever watching was the one for Dante's Inferno, and that only because I wanted the game.
My favorite halftime shows the past few years have been The Who and Paul McCartney. Legends for the win. And the Who's whole Super Bowl performance was released to Rock Band, which is undeniably amazing.