#1 - Give it a new name. Windows Tablet OS.
#2 - Ditch the desktop. Nobody buys a tablet for performing work. This will reduce the overall footprint of the OS significantly and bring it closer in life with iOS/Android. Metro Office is coming soon enough for anyone who wants to do that. Sort of like iWork for the iPad.
#3 - More sensible form factor. 4x3 like the iPad. hardware orientation lock. A really good SoC, and of course a retina display. No kickstand.
#4 - Make sure TellMe has been upgraded to be a true Siri competitor.
#5 - Get the content store(XBox) ducks in a row. People need to be able to buy music, movies, rent TV shows the same way they currently do in iTunes.
Once Microsoft does all these things, a Surface Tablet will be a true iPad competitor. If it's just another rehash of the current thing, it will fail even harder.
If you want an Ipad, just buy one.....I have a Surface RT, and I love everything that differentiates it from Ipad - the expandable storage, the USB port, the Keyboard cover with trackpad, the kickstand, Microsoft Office - ON DESKTOP, DESKTOP FILE EXPLORER, CMD, REGEDIT, ETC. DO NOT GET RID OF DESKTOP! All that needs to be done with Windows RT, is for MS to make the desktop portion more open, so that people can install any open source software they want at their own risk of course.
Actually, I use my tablet for work all of the time - I use Remote Desktop, connect to workgroup, let my PC do all of the heavy lifting while my RT controls it.
What they need to do, is make the Surface RT2 with Snapdragon 800, LTE support, higher resolution screen, make a docking station for both the pro and the RT for external display connection, fix the damn wifi bug that will not allow me to connect to my tethered android phone, and give me some damn EA sports and Gameloft games.
I never used iTunes for music, or any media with my ipad, and I do not use the Windows store for it either. I typically borrow music from friends, or use streaming. I have never rented or purchased a movie from these either. If im buying a movie, ill buy the blueray version that comes with a digital copy.