I do not see how legacy apps (i.e. x86 binaries) will run on ARM-based windows tablets in any meaningful way. While they could in theory use x86 emulation, it would be very slow and power-hungry, I just don't see it being practical, so you'd have to wait for ARM versions of your existing apps. That's if ARM-Windows turns out to be anything more than a soon-to-be-forgotten sideshow, as I personally suspect. The whole point of running Windows on a tablet for me is binary compatibility, otherwise I'd have bought an Android tablet; I just can't see why anyone would want to buy a non-binary-compatible Windows tablet. Maybe Intel will manage to come up with an x86 chipset that can compete with ARM in performance/watt, that would definitely be more of a step forward for Windows tablets....There is something I need to add to my original post: the hardware factor. Will legacy apps run on ARM based Windows tablets? Or maybe Intel will finally release some tablet oriented CPUs after letting ARM, Nvidia and Apple take the lead on this?