I suspect college sports are going to lose a lot of popularity across the board because of the factors we've been talking about: it's hard to root for a team when you don't know any of the players. Even pro teams don't have this much turnover. It's especially hard to get excited in the offseason when everyone is new.
This is why, in my opinion, the antitrust judgments have gone way too far. Antitrust is not supposed to be a death knell for an entire industry.
It's also hard when you don't know who your rivals are. Part of that is conference re-alignment, but part of it is also that teams can buy themselves into contention all of a sudden. In the old days, if you weren't following carefully, you could still be pretty confident that UNC, Kansas, Kentucky, Duke, etc. would be among the best teams most years. One or two might have a down year, but usually the UK-UNC game in December was big. Now, teams can suddenly buy themselves stars, and I'm like -- since when is Auburn a 1 seed? St. Johns a 2?