I'm expecting it to be relatively low-key. They'll showcase the Neo, but they will talk about how closely tied it is to the PS4; they don't want to alienate that install base. They will talk about the increased power, but I don't think there will be a lot of hoopla about it. I don't even know if they'll give specific numbers (hope they do). I don't expect them to show a Neo demonstration reel (e.g., Neo vs. PS4), but I guess we'll see.
Then we'll get the "reveal" of Neo's ugly brother, Slim, plus another look at PSVR, with games to showcase that. And a little on the new controller.
I'm not expecting much more than that. It'll be good to have the Neo actually revealed, though, with price and date.