I, for one, welcome this development. It brings some hopes for better performing Flash, which I hate with a passion but its a fact of life. Flash is in need of some engineering muscle. There are many things Microsoft can possibly do to it and most of them are good, see: kill it -> good, open source it -> good, merge with silverlight -> good.
Same thing with other Adobe products: they used to be best in class some time ago, but I'm convinced that company cannot code anymore, but Microsoft still can.
No way this is bad news. The worse that can happen is nothing changes.
Edit: also, lets stop this nonsense with applying "still somewhat profitable" and "dying" to these companies. Both are doing great financially. Adobe's profits from CS keep breaking records - look at http://www.adobe.com/aboutadobe/pressroom/pressreleases/2010...