I don't really like Adobe as a company, but whenever Apple buys a professional tool house, they kill it but awful. Witness the demise of Shake and Silicon Grail, both top notch compositing packages for Irix, Windows and Linux. Jobs bought them both, jammed them into a forced marriage and told them that their stuff could only run on Apples. People in the effects industry stayed away in droves (because of the Mac as dongle thing), which finally led to Apple fire-saling the Shake source code and killing the product. _That_ sure worked out well.
Now the only professional compositing option for Windows and Linux is Eyeon Fusion. Not a bad program, but the only one left standing thanks to Apple's actions. I suppose that if Apple buys Adobe, makes everything but Flash players Mac only, then Corel can finally make a comeback...? ;-)