I hope Apple use this opportunity to reset the story on the Apple TV (a new Take 2 if you will). It's a product with a lot of promise but it's been mostly hampered by pricing.
I'd like to see the current box dropped to $69, with the 4K model at $129. $99/$149 seems more likely.
I would also like to see them make more of an effort with gaming... could be a really nice option. Get Rockstar, SE and others to bring their iOS games (GTA, Bully, FF, DQ etc.) over.
Seems very likely that there will be a new Siri remote so that's something.