Nope, no Microsoft store... and I don't really have enough experience with screen drawing to give you an accurate account of how one would work (I don't rock that kind of hardware in my day-to-day).

I absolutely hear you about how the software issue.  With my old Mac i could boot Classic and use my old OS 8 and 9 programs (like Nisus and Photoshop 5.5) but not with my new one.  I notice that a couple artists and writers... people who use their computers to create, find a point they like and stick with it.  Remember when... was it Final Cut Pro?  Final Cut Pro was this really popular video editing program for Mac and then they changed it all around and it p*ssed off the core group of users because it was basically a massive downgrade, going for a wider audience instead of making it better for their primary audience.

I honestly think the answer to this is open source software, people making the software they want with the capabilities they want.  There ARE problems with this approach, obviously, but if you're creative, the tools you use should be in your hands and not subject to sudden and arbitrary changes.  And there could definitely stand to be some competition, you know... I HATE Microsoft Word.  Absolutely hate it, never use it, I don't even have it on my computer, imagine that!  And everyone uses it, it's almost a requirement.  There used to be a bunch of other word processing programs and they could interact with each other, but that all went away.  I sincerely wish I had a fantastic alternative to Word for word processing (I just use Textedit and Writeroom, which is a Textedit skin that makes it look like I'm typing ona n old Apple ][).