Re: To the naysayers
Actually Win8/x86 allows you to install what you want on your Windows tablet. Including stuff like a development tool to write more software. Elipse or Netbeans run fine from experience. So that gives you at least two options.
For another OS to interest me on tablet pc it must have:
+ Pen (Wacom and NTrig, see below) support at least equal to Windows 7 (Handwriting recognition etc)
+ Tool support at least equal to Windows 7 (MS Journal, Artrage, OneNote, Total Stylus integration)
+ Useable on tablet and desktop - one OS and UI for all systems
+ Speach I/O at least equal to Windows 8 or the equivalent to Dragon Natural 11 (OFFLINE!)
+ Useable as a notebook or even desktop replacement
+ Full support of available hardware platforms (OS follows hardware not the other way round)
+ Controll over power consumption equal to Windows 8
+ SD card slots
+ Miracast support
+ Touch can be completely disabled
+ Producer delivered patched comparable to Windows for duration