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Jonathan Zittrain comments in the Financial Times on the centrally controlled "paradise" of Apple.

The iPhone's hybrid model of centrally controlled outside software is already moving beyond the smart phone. This is the significance of the iPad. It could have been built either like a small Apple Macintosh - open to any outside software - or as a big iPhone, controlled by Apple. Apple went with the latter. Attach a keyboard to it and it could replace a PC entirely - boasting plenty of new apps, but only as Apple deems them worthy.

If Apple is the gatekeeper to a device's uses, the governments of the world need knock on the door of only one office in Cupertino, California - Apple's headquarters - to demand changes to code or content . Users no longer own or control the apps they run - they merely rent them minute by minute.

The Apple logo may be a sign: once you have taken a bite of the apple you can "check out but never leave".