A Belgian developer posted two screenshot of what seems to be the follow-up development build to Windows 8.1 The screenshots show a totally revamped start menu, live tiles and a new Windows Store. Multiple sources claim that the screenshots are valid and real.
looking at the screenshots they show an internal build of Windows 8.1 Pro, but with version number 6.4. The current Windows build is 6.3. Next to the new start menu little new is shown.
The Belgian developer Bavo Luijsterborg posted the screenshots online at myce.com Microsoft has not responded. Windows Threshold aka Windows 9 will very likely be released next year already.
