Just a bit more of history, as food for thought. (I'm immensely enjoying our discussion, by the way. Nice to discuss without name calling and still be able to be respectful of one another.)
Windows never really was fully adopted by power programs until Windows 98 came out, and they showed how stable it could be, and they showed that power programs could be handled so well with it without having to implement your own graphics drivers for every non-standard graphics card on the market. Windows took care of that. People doubted that the Windows API could be as fast as a DOS program, and when a few high-end graphics intensive games came to the platform, everything started to change. I suppose if a game like Tomb Raider 2013 came to WinRT, and WinRT handled it as well as the Win Desktop, then it would convince a lot more people of the capabilities, much like when Tomb Raider initially came to Windows and surprised a lot of people with what Windows could do. I use Tomb Raider 2013 for the modern example, because it was known for many years as the one to push the envelope of what could be done, and when it came to Windows the first time, people were truly impressed with what Windows could do. I remember it was after that release that I actually started to use Windows more full time and stopped doing so much in DOS.
There are times I will still use the DOS shell or Power Shell when I need to do something nothing else can do, but only to make a change within Windows by hacking and tweaking where nothing else will work. However, that occasion has fallen to practically nil, except I have a WiFi Adhoc that starts and stops by running a batch file as administrator. I wish that was something that could be done inside the Windows interface, but Microsoft has never fully implemented all the capabilities within the GUI.
Yeah, I've gotten into an off-topic rant. Sorry. Anyway, what I'm trying to say is that when WinRT is demonstrated as a viable alternative for power programs and high-end games, it will begin to get more adoption. I'm not saying it will get the adoption by having the capability, it must be demonstrated and shown-off.
Rhapdog
AKA: Master of the inordinately long post.