Cloud-based software deployments will not apply to all types applications. It may be the magic pill that a software development firm/publisher has been waiting for but it has very little motivation/benefit for the user. It is such a great inconvenience to the user. There are instances where SaaS is invaluable. Office365,Google Docs & Apps, SalesForce etc seem to be doing very well. But I doubt Adobe CS on the cloud is something people would want.
Perhaps in the developed world where they pay for broadband by the penny.
I am still using Photoshop & Illustrator CS2 and they meet my full needs. There are certainly better features in CS6 but I cant imagine running such an app off the cloud. Some of these companies are killing themselves.