I just got done reading Hackers and then Revolution in the Valley, so I recognize samcraig's complaint about a walled garden as something Apple has dealt with since its inception with the Apple ][ being Woz's exception to what soon became a standard complaint about the company.
I understand the desire to have people know how things work. That's the hacker ethic. Hackers want to understand what makes things tick. That's a very useful skill. I applaud it. As someone who knows how to fix my car, and who has put computers together, knew DOS inside and out, wrote assembler code, etc., I can relate to what is being said.
But I applaud Apple's approach. Why? Because I've seen humanity, and most people -- the vast majority -- do not want to know how things work. That itch that hackers have is not shared by most people. Does this lead to the dumbing down of society? No, society was dumb to begin with. The hackers thought they could raise society up from this level by showing them how to hack computers, but most people couldn't care less.
So what do we do with a society that does not care? The hacker says give 'em the hacking tools and let them learn anyway. Steve Jobs said, no, give them a simpler device and let it work for them.
(edited for brevity)
So why must we insist that Macbooks be completely open, or that the Mac App Store be wide open to anyone who wants to put whatever junk they want inside? The walled garden approach taken by Apple (and almost everything else in our society -- TV, book publishing, sports teams, you name it) is a recognition that we are all different, not everyone wants to hack things, some people simply want to use a tool to do whatever appeals to them.
I'd rather live in a world where Apple creates powerful but simple devices that empower even the tech illiterate, than to live in a world of complicated devices that only a small percentage dare to use. The hackers will always be among us, and hackable devices will always be with us, so don't complain about one company that decided to market to the other 90% of humanity in ways that please the customer very much.