Skate and Skate 2 have a splitscreen option? If so, point it out. I hadn't ever heard of that. If it does and Skate 3 doesn't, I'll go out and buy Skate 2 right now.
If you're referring to some sort of "alternate turns" mode or a LAN play option or something, then I guess I'm less concerned about something like that. But a free skate splitscreen mode is everything for me... and I don't believe that Skate (1) had it.