The 5.1.7 update was so effective.
It didn't stop m using Flash, yet I was a whole update behind.
Mine was: 188.8.131.526
Obviously it only works if you have the Flash System Preferences plugin
I'd also like to see an iTunes web app, and perhaps a Settings one where you can remotely control iOS and Mac settings.
Although, I would like to see better security on iCloud.com. Perhaps passcode locking each app?
I think there are three things that could help it take off: 1) Allow boxed software. For example: Pages, Numbers, Keynote in one iWork package; or the Microsoft Office suite. 2) Allow demos! Either X days or Y hours of using the app. 3) Introduce mass-software purchasing for schools and businesses.