I do apologise if this post is very biased, but I like to defend my platform of choice from time to time :-)
Don't apologize.
We all know MS is not a leader in innovation, despite the assertion that they are. They are playing catchup to Apple these days and the only way they will get close is if they buy up every company that competes with Apple.
You're right about Adobe, it would be a disaster if they killed PhotoShop and the graphics suite for Macs. But that would probably incur the ire of the government unless Apple came through with an application of their own. Actually that would be great because it would be less bloated and probably easier to use. Nonetheless, the graphics pros are wedded to Adobe for the most part and that would take a bite out of Apple's media base. Then again, one could always run Windows to use the Adobe products.
Yes but even though you can run Windows on a Mac, it will probably see Mac sales fall, media professionals will be able to get equally powerful alternatives that will run their programs... if there is no Mac version what excuse would they have to buy a Mac when their companies can get them cheaper PC's whicih will run the same software...