This would be quite interesting. If Microsoft bought Adobe, what would happen to PDF on Mac? What would happen to Silverlight? Would the next Office use PDF as a standard format?

Then there's the creative suite. What would happen to photoshop? Dreamweaver (or MS Frontpage 2012 as it'd be renamed)? InDesign (or Microsoft Publisher 2012 as it'd be called)?

Also think about the other side of it. The Acrobat team would be forced to actually secure their reader instead of relying on researchers to do it for them.

I think this can only be a good thing(tm). As Dan Kaminsky once said, "What could possibly go wrong?"