It's nice, but I really don't find it vastly preferable to a friendly update notification and a quick application restart - especially now that most applications open in the state they were closed in, and with an SSD the restart is barely a blink. In fact, I like to know the feature additions or design adjustments happening to an app, so I enjoy the notifications - it's like I'm getting something for free (which I am, actually).
I don't think it's a huge advantage for average users, either - %90-percent of iPhone users are on the latest available major OS version, and that (until 5.0) involved a huge non-delta download, physically docking your phone and an onerous, lengthy (well over 30 minute) process, during which you had limited use of your phone.
I don't think it's a huge advantage for average users, either - %90-percent of iPhone users are on the latest available major OS version, and that (until 5.0) involved a huge non-delta download, physically docking your phone and an onerous, lengthy (well over 30 minute) process, during which you had limited use of your phone.