OK, I realize that I am opening up pandora's box here, but really, Xamarin.Forms is such a spectacular achievement, I can't help but to wonder its possibilities.
I am wondering if thought has been given to perhaps extending Xamarin.Forms' reach out into the Desktop in addition to the current mobile devices. Specifically, I am wondering if it's been considered to enable Xamarin Forms for WPF. The idea, of course, is to be able to reach the workstation/desktop market in addition to the mobile devices. For reference, here are two incredibly useful links that show the break down of the two marketplaces:
Mobile: http://www.netmarketshare.com/operating-system-market-share.aspx?qprid=8&qpcustomd=1
Desktop: http://www.netmarketshare.com/operating-system-market-share.aspx?qprid=10&qpcustomd=0
Currently (from what I understand), Xamarin.Forms is not able to reach the desktop environment (please let me know if I have this wrong!), so at the end of the day, a development team would have to create yet another application to reach this market (defeating the whole vision/purpose of Xamarin.Forms).
It is also worth noting how little marketshare Windows 8.x has in the desktop market. I know that Xamarin is aware of extending support for Xamarin.Forms to "Universal Apps", but that will only reach a small % of the market. On the other hand, if they attempted to extend support to WPF (or XBAP), they would be able to reach ~90% of that pie.
Just some thoughts I had to throw out there and wanted to get some discussion around. 
Thanks in advance for any participation!