I can see lots of reasons for Adobe to want to move to the cloud model. Harder to pirate (I'm guessing) as you will probably need an internet connection in order to use the software each time you run it. It makes it affordable for many more people (lots of whom I'm guessing are the current pirates). Assuming the price is $20 (say £15) a month, that comes to £180 a year and always having the most up to date version. Right now I don't think there's anything in the latest extended suite I feel that I desperately need over CS4 which I already have, but I guess that will change at some point.