Ironically, we're nearly back at the "renting" phone stage. Sure the companies selling the phones don't use that terminology, and it's a one-time payment for the life of the device, but full control of the device is never transferred to the user. The company holds the keys and will only allow you to do what they want you to do. This certainly describes iPhones and most Android phones to date, and it's getting worse on the Android side as root becomes harder and harder.