Now it is fully developed.
The Verge has been confirmed by unnamed sources that Update 1 for Windows 8.1 is fully developed but not yet leaked.
Coming next month
According to Microsoft leaks Wzor the final version was compiled on 21 February. The roll-out will take place next month.
Update name is not specified, but the purpose is to make users without touch screen more to the team ..
There are in fact possible to attach Windows 8 apps to the toolbar and resize “Live Tiles” with right mouse click.
Moreover, the machines that do not have touch screen start straight to the desktop by default.
Another very nice improvement is that the audio and picture files opened in desktop applications, not Windows 8 apps on “boot-to-desktop” is enabled.