Technically, its "possible". But nobody is going to take the time to port Windows8 to the Flyer. Windows is closed source, making porting it over extremely difficult. Plus, there would be no drivers to make the hardware work with the OS. I'm no developer, but the enormous amount of work to overcome these obstacles make them infeasible, compared to simply buying a Windows 8 device (when they become available).
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Phone: AT&T HTC One (M8)
Tablet: Samsung Galaxy Tab Pro 8.4 (WiFi only)