As others point out, pretty much all interest seems to have come from Linux developers, or people who'd like an alternative to x86 as their (Linux) desktop.

It should be pretty clear by now that most Windows developers do not care about ARM. It's not that I think they are dismissive of the platform, but they are waiting for Microsoft, Dell and Lenovo to deliver a finished product. They aren't going to spend time on yet another failed Microsoft hardware experiment.

Windows developers aren't going to switch to ARM in large numbers until Microsoft and partners can deliver a platform with a decade or two of longevity. They are completely accustom to Microsoft preserving backwards compatibility and they'll expect the same to be turn for a architecture switch.