I have some in-laws who have barely moved their icons around. They love their iPhones and PhotoStream, FaceTime, browsing, calling of course, customizing their wallpaper. They love their 4s phones and share an iPad but they're wary of updating cuz, well, iOS 6 works just fine. And it does. I may tell them about automatic app updates, new sounds, Control Center at some point and I'm sure they'll be happy to update then.