Agree with some of the wishlist.
I also agree about the idea of ipad as autonomous (or maybe less dependent?) device too, and actually was one of my first thought about ipad in 2010. I think that Apple first should redesign the way that iTunes manage iOS devices, sync processes, files, settings and backups to do this.
The "support multiple simultaneous apps in a windowed fashion" thing also is a really good way to do some real multitasking, maybe for just two apps at time. I do a lot browsing while watching videos just to find some informations about it or comment on while watching streamed talk show in social tvs. Even though IOS force us to "focus" on one app at time, it's really annoying to switch every time between, in example, youtube app and safari.
Another thing I really do not understand, that Apple should address in iOS5, is the camera roll. I have 1650 pictures in my iphone all in the same place. No tags, no exif, no data, no way to categorize. Really? Come on...