My wife and I say that if Madonna ever does a Vegas act, we'll go just to see it, and probably see it twice in one week. She was an icon of my high school years (late 80's) and despite being a glam rock fan, we listened to her anyway. The new song sucks, but I'd still pay to see a show with her in it.
If you grew up in the 80's, Madonna was #2 on the list of pop stars, trumped only by the late Michael Jackson.
I thought she did a great job during the Super Bowl's halftime, despite having to carry LMFAO, of whom I'd never seen a single photo or video, and only knew them because of the pre-show video where they wound up in a country bar.