iPad/iPhone/iPod touch are mainly content consumption devices, that is why Apple locks them down. So even the most technologically ignorant person can use them

iPad/iPhone/iPod touch are mainly content consumption devices, that is why Apple locks them down. So even the most technologically ignorant person can use them worry free and not end up with all the issues like they've had with Windows and even sometimes OSX machines. OSX machines are REAL computers that let you do whatever you want. And OSX is mature, you won't be seeing many changes to it besides those that trickle up from kernel optimizations that occur on the iPhoneOS platform (Apple has moved many devs over from OSX to iPhoneOS). An app store may be in the cards for OSX, but app lock out (locking out anything except app store apps) is not going to happen. If Apple did something like this, it would kill a large portion of their creative, scientific and development market. It will just be an easy application distribution system for those who want to a more convenient way to buy software (and for developers who are willing to give Apple a cut for this convenience).