There are a huge expectations for the Windows 9. Since windows 8 and 8.1 are not a big success like its previous version windows 7. Windows watched Paul reports that the windows 9 may be launched around April 2015. The company will unveil the vision of windows 9 in the developer's conference of 2014.
No one couldn't guess what type of changes will be made on the new windows 9 but there are some possibilities for the improvement in the Metro OS of the system. Upgrades in windows apps and tiles will be done. There are some possibilities of start menu is getting back to its position. And metro apps may run in the traditional windows.
On the other side Appe's OS X mavericks is a successful one eventhough it is free upgrade from the App Store. So it's clear that if windows couldn't make it possible many users will just jump from windows to mac including me.