fpg: Nope, I vote for a detachable hybrid. Tablets are not for work since I need to carry around a keyboard and I would rather have everything nicely packaged in a single unit.
The reason I need Windows:
So that my trusted Sony Camcorder can access my trusted PMB software and can work seamlessly with it. The last time I checked, Sony doesn't provide this on Macs, and I'm pretty sure they don't provide it on RT or Android.
Extend that to hundreds of thousands of devices. Most users want to get things done, not be on the bleeding edge.
Summary:
I need ONE machine (laptop/tablet) that can handle what I currently have - and provides me something that I don't. Not take away something that is tried and tested.
So a detachable, dual OS Windows/Android is something that I would vote heavily for - something like the Asus Duet T300.