After the launch of Windows 8 and Windows 8.1, there is no official news of what would come next. However there are rumors from Phone teams and other sites that, we could get Windows 8.2 or Windows 9 after this.
Windows 9 is said to be available for launch around the month of January. It is not yet sure whether the New Windows 9 would be an upgrade from Windows 7 and can be brought as an individual product or we need to get help from Windows 8 for an upgrade. As per Microsoft blogger Paul Thurrott, Windows 9 would be released in April 2015.
Windows 9 could be cheaper and sleeker in appearance. It would also run on different screen sizes. Windows 8 would also help in saving power.
Like features of Windows 8, Windows 9 would also have 3D features. Some notebooks would also have 3D cameras. Gesture recognition would be easier and then you could wave at the screen from a distance.
Windows 9 would also consist of Direct Experience. This is a way where Windows would be playing media files in a special purpose operating system and there would be improvements in Hyper-V for Windows server. In all Window 9 would run a lot better than the previous Windows. This would be well attuned with the next version of the Xbox which would be based on the most essential parts of Windows and is expected to be shipped in the autumn season.