After windows 8 and 8.1 , Microsoft is planning to release windows 9 instead of releasing windows 8.2. Most of us were also thinking that next window would most likely be windows 8.2 . Microsoft plans to provide a update to windows 8.1 ie update 1 or (GDR1 internally) and windows Phone 8.1, there would not be a major update for next 15 months as microsoft is thinking to release windows 9 in april next year.
Windows Phone 9 is also expected to be a part of windows 9 threshold release next year.