Unfortunately this is a PR partnership and nothing more. People may get together on a stage but it is about as meaningful as a photo-op between President Obama and House of Representatives Republican leaders.
In reality, the touch enhancements apply to all touch enabled Windows devices, not just Surface devices. They are also only exclusive to Windows because there are no touch Macs. Otherwise, every enhancement in the CC applications apply equally to Windows and OSX. This is a silly sort of exclusivity that is the equivalent of saying you can't get four wheel drive on a motorcycle. This is also still actually Adobe's second priority. Anyone who thinks otherwise should look at the IOS version of Photoshop Touch that has been out for a long time (in fact just as long as Windows 8) and check out the IOS version of Lightroom mobile In addition, what was not mentioned here today is Adobe also released a new suite of apps for IPads. As it stands, it is nice to see the touch improvements but it took them to years to get it to experimental and touch is still a joke in the full version of Lightroom. Sorry to disappoint people but people should take all of this with a large grain of salt.
On different fronts, Microsoft never seriously considered acquiring Adobe. It was a rumor both sides quickly quashed based mostly on the fact that Ballmer met Adobe's CEO a couple times. Flash for mobile is also not coming back. Adobe shut the project down and no one is clamoring for it anyway. For mobile devices, Flash was already in decline when the project was terminated; HTML5 continues to move forward; and Adobe is heavily invested in AIR as its platform of choice. As for something big from Microsoft, they have already made that announcement - it is Windows 10. The next big announcement is also pretty well known - the touch enabled version of Office.