I think to a certain degree, perceptions have a lot to do with the current controversies...
Now, I have absolutely zero documention to back this up, so please accept it as nothing more than my opinion...
I believe that a very large segment of users simply do not see "Tablets" as anything other than toys, for lack of a better term. You can include in that the 'smart' aspect of smartphones. For anything serious, critical, important etc it is laptop or above for said tasks.
Thus, only a small segment see the need for a full fledged windows os on a tablet, which in turn could help to explain why 8 has not set the world on fire.... totally aside from the whole tifkam debate.
If this were Windows 7, it would be considered quite the opposite. If OEMs and Microsoft REALLY pushed for tablet PCs with 7, we'd be in a totally different situation with 8.
By the way, speaking of 7, that was the most recent OS designed for touch with larger window control buttons, larger Taskbar, better battery life and support, and improved handwriting recognition. It's not an OS for toys but for serious things that ios nor android can handle.
Well, I never said or implied that absolutely nobody ever at all in the whole wide world used them for anything other than a toy, now did I..?? I can easily conjure up scenarios where a tablet has legitimate usefulness.
I was talking big picture.