>"Adobe and Autodesk all have multiple apps on iOS"
They don't really compare well, iOS versions lack a lot of important features in comparison with the windows ones.
>" How many Metro apps have they released? "
I believe the point is they don't need to, they desktop software runs just fine.
>"All the software you're talking about only really works in desktop/laptop mode with a mouse"
Not really, all those apps actually benefits from the use of a stylus (actually artist prefer that more than using a mouse) and that's something that you can't really do with an iPad (I own an Ipad2 and I had really tried hard to do anything productive on it without luck)