It's a bit subjective since one company had huge market share out of the gate and invented the category, while the other keeps releasing 'new' products, years later. So yes, there's growth for now. For Wall Street, growth is pretty much key.
>Why is it that when MS makes a "new" product and category, you put it in quotations, yet when Apple does it, you don't?
Because one dominates and defines the market, as can be seen by any before and after, and the other is just putting out some products few people care about.