Well thought out. I still disagree on several points.
...you should have the Option of driving everything from the desktop interface, and not leaving it.
...it is not the preferred way of driving a workstation.
1) I don't agree with driving everything from the desktop.
You lost me there. Driving everything from the desktop is IMO, old fashioned.
Then simply click on TileWorld from Start on the charms bar. Nothing i'm suggesting is going to make it go away. What i'm saying is if you have a small mobile device(Windows Phone, Surface Mini), you should be using TileWorld. If you have a larger device like a SP, desktop/workstation, you should have the ability to either drive everything from the Desktop or drive it from TileWorld, that choice is completely up to you. Your stance seems to be that everybody should be running from TileWorld. The two interfaces should be independent of the other and not crossover from one to the other and back again. Its the crossover that drives people nuts.
2) I don't agree with windowing immersive applications or running them on the desktop.
Multi tasking can be achieved without concurrent windows.
But why would you want to reinvent the wheel? And if immersiveness is your thing, all that functionality would still there. Charms -> Start -> Have A Party. Now you can use your desktop computer like a mobile device. Good for you. Stop trying to force other people into that same experience.
3) Don't agree that WinRT and Win32 will retain equal status as code evolves.
The only way they wouldn't is if Microsoft removed Win32 entirely, which isn't going to happen. You have a misconception of how code works. They're all just API's.
...If I doubleclick Angry Birds...
There's no reason to have or allow seemingly frivolous games on a commercial workstation.
So now you're going to ban entire games from running on computers? What after that, burning E-books? What further laundry list of stuff are you going to say can't run on systems. We're already at the Desktop, Games you consider frivolous, what else? And for the record I used Angry Birds as an example because it is one of the most well known Apps out there, not because I've ever run it, which I haven't.
This isn't the 90's, man. The "public" has plenty of options beyond Windows 8, including Windows 7. So don't think you can shove something down the public's throat and say 'swallow'.
So you're saying the "public" will go with Apple, Linux or Windows 7 because of a start screen.
Once again, not saying the start screen goes away. Think of them as the Mobile Interface and the Desktop Interface. Both should be accessible, and both should be able to drive both Apps and Applications in their respective ways without dealing with the other. Its awful to the point of ludicrous to have cross-interfacing.
I never run my main applications full screen, why do I want my Apps each taking up the whole screen and hiding everything on a large monitor?
We'll have to agree to disagree with personal preferences.
I prefer immersion.
And my method would give you everything you want. But it would also give those people who don't prefer immersion what they want, something you can't seem to be able to tolerate. You, like Microsoft, want everything done Your Way.