I don't understand why news outlets are making such a big deal of this. Amazon have offered software downloads for a while now. Previously it was just Windows software; now they also have Mac software. It is not like it is unprecedented for a website to offer Mac software downloads.
I think one reason it's news is because people have predicted that Adobe CS and Office will never be on the Mac App Store. If there's a competing store that does offer such titles a few big titles like that are enough to give it some steam. And it's Amazon so they already have steam.
