iOS 5 does so much behind the scenes but what I want from iOS now is something completely fresh. I think Apple feels safe using an interface that everyone connects with instantly, but when things start to feel stale people are bound to want to get something new like that shiny new Galaxy S2 (Currently suffering this urge). Siri and the 8MP camera of the iPhone 4S are hardly reasons at all to upgrade for current iPhone 4 owners. There is nothing fresh design wise about the iPhone 4S, and I’m not even complaining about the look of the iPhone 4S, I just was really hoping for some kind of a new chassis.
To finish my rant, keeping things fresh and new are really important. I think it is safe to say tech design needs to refresh every year. Interfaces not so much but should have new features that define new versions of the OS from one another.