Windows 8x survival probably isn't in any doubt, its popularity is another thing
--but, see below (I expect it to be.)
I think it will succeed, at least for consumers, even as a spillover from their smart-phones
--even surface looks OK (netbook style computer as far as I can tell), except what looks like a membrane keyboard instead of a real one.. (at least as it appears to be on the TV advertising)
And of course people will just get used to their new style, and adapt as necessary..
--it would take much longer for businesses to changeover, lets say 5-10yrs, because they tend to hang onto their infrastructures far longer than consumers..
And I mean big corp usually
--smaller businesses might be tempted to use it/try it (win 8x) just to see if there are any advantages for them..
However despite what is the usual caveat for business: training, new interface style
--that doesn't stop business users/corp's from eventually or quickly switching over
They can usually expect lots of support from the vendor to get on track to their strategy of updating an OS..
It can also be a generational thing: younger people want to be trending and if they happen to be in charge will want to jump into the new pool