Just got a Dell Venue 8 Pro tablet over the Thanksgiving break. It runs FULL Windows 8.1 and I was able to cast Chrome tab @ 720p without any lag to my Chromecast! I then tried to cast 720p Extreme but it was laggy. So far I could only cast 720p Extreme on a new MacBook Pro. The Dell tablet does run a little warm after a few hours of casting tab.