Why would they leave Detroit? I mean they have a struggling economy and the highest unemployment rate in the country but they are filling the seats. I go to two Pistons games a year, and they still are managing to get a full house on some occasions.
If anything, I think they should move a Californian franchise to Vegas. Or now since The King is gone, and nobody is probably going to the Cleveland games, they should move Cleveland (Just kidding).
I think getting a team in Vegas would be a great move, because well I love seeing new teams always. Just who is the question. I don't think Detroit would be the right move to Vegas since they are probably top 6 of NBA franchises (1=Celtics, 2=Lakers, 3=Chicago Bulls, 4=New York Knicks, 5=San Antonio Spurs, and 6=Pistons).
I like the idea of a Vegas franchise, not Detroit though, still very unlikely to happen.