No. WindowsRT will not demolish support for desktop any more than Android phones will.
In case you thought otherwise, I meant WinRT as in Modern apps, not as in the ARM OS.
They are different devices aimed at different audiences.
This doesn't make sense to me:
If you are talking about Windows RT (ARM), desktop applications are not supported and I have no reason to believe they ever will be. Modern is the only future here.
If you are talking about Windows 8 (Intel), then you seem to be claiming that Microsoft has purposely chosen to target one OS at two different audiences, the desktop audience and the tablet audience, with no intention to bring them together for a cohesive user experience.
I can't believe that you, after all this time of arguing with WTWF, actually believe that last statement.