I often have discussions with people on why I don't want an iPhone. It boils down to their 'restrictive' nature, and it made me think about why I would probably never own one. For instance, to listen to music or watch video you must use iTunes to sync the media to your device, in a format supported by iTunes. All the apps must be approved by apple, can be revoked at any time, and must be purchased via iTunes.
While the above reason is a major reason for my dislike, it is that to me the devices are all about consumption rather than production that really turns me off the devices. Sure you can twitter and facebook on your iPhone and iPad, but to write this blog would be a PITA (unless you used an iPad apple keyboard $$$). Granted there are some things that it works really well for (apparently there is at least one amazing painting app on the iPad), but in general you can only effectively use it for watching video, browsing the internet, and playing games.
I don't know why I have such a problem with this, perhaps it is the fact that I enjoy tinkering with things rather than watching youtube and facebooking all day. My laptop can do that, and a whole lot more. I can appreciate why people like these devices, they do some cool things, but their limitations would be a constant reminder that I can't actually DO anything with the devices.