As someone else pointed out to me, fighting games (like Street Fighter) and sports games (like Madden and FIFA) still have local multiplayer. But that is a far cry from the olden days of local couch multiplayer or co-op. And none of these are split-screen.

It's really too bad, because those kinds of games were a ton of fun. I wonder if they will see a resurgence at some point in the future? Seems like something someone might tap into at some point and people go crazy for it in some way that results in a few fairly high profile games in a relitively short period of time.