Not sure if this has been mentioned or suggested, created or whatnot.
But, I would like to see the Gamemastery Pathfinder Combat Pad ( http://paizo.com/products/btpy9066) be integrated into the DM Screen itself. I like to have my initiative tracking and round tracking available for all my players to see. Not hidden away where it does not help speed up the combat. It also helps a DM not miss somebody or something.
Many have created versions of this...but I have put something together like I am describing. But, obviously a more developed product could help the community.
http://www.flickr.com/photos/118541215@N07/with/12736996723/
Wishlist-
Way to track initiative for all to see,
Way to track rounds,
Way to track conditions and which round they will expire,
way to show held actions.
All the above.. in a DM Screen.
Honestly, I'd just want better tables, like a list of combat actions. Or a way for us to put our own tables in. I found only two screens on the market that do this and their prices are outrageous for much inferior materials.
I'd prefer a landscape orientation, even if that meant an uglier layout.