I think there are only 4 falconers, besides myself, using Windows Phones - but there are plenty of us with Windows desktops and windows based tablets. There are very simple development tools to port any iOS/Android application over. So simple in fact, that my standard response when I see apps for iOS/Android my response is "Am I not worth 15 minutes of your time?" (the time cost to do the build, once the tools are installed).
I think this looks like a great product. Great innovation. As a shortwinger, I'll just have to wait for a lower cost alternative, but I look forward to that a few years down the road. I'd love to be able to drive up and pick up my hawk instead of wandering through industrial areas with a receiver. However, since I typically pull out my receiver less than 5 times a year other than to verify its operation, its tough to justify a 2 grand conversion.
Which brings me to a question - any plans to make a GPS/Scout? I don't need the range of an RT plus, instead I need the long battery life of a scout.