What does Windows RT/Modern UI need?
Well, what I'd like from it would be:
-Modern UI version of Office.
-A Wacom digitizer for Surface 3. OneNote is awesome, but I'd love to be able to draw/hand write notes.
-Smartglass to have immersive mini games for Xbox one games. Like a way to mod/set up your car in Forza, have an AI driver compete in some of your career races for you. In Madden or FIFA, have a manager/coach mode where you can make trades, set training routines, simulate games that you don't want to play, but make coaching decisions.
-Improve the photo app. I want to see better photo management, think tagging/face recognition, keywords, ratings. I love how SkyDrive uploads my camera roll, I just would love something like this added in.
-Just treat the modern ui apps more maturely. Give developers what they need to desert the desktop.
Seriously, if they improve the photo app alone, I doubt that I'd need to have my pc anymore.