I've always thought things would go this direction, anyway.
Major league sports teams make so much of their money on TV ad revenue and merchandising. Stadium receipts are so small I've often wondered if they might not be cash-negative after taking facilites costs into account.
Heck, they can play in front of a Blue Screen and have the background and sounds dubbed in.
Since I know sports, I don't have to have the sound on when I watch on T.V. I get sick and tired of all the chatter from the broadcast booth. I learned the games as a child either from going to see them and having them explained to me or by being the consummate tomboy and playing them with the neighbor boys.