I love tinkering and don't think it's at all useless. What I hate is that the same things that make computers so tinkerable are what make them so frustrating for all the people that don't want to tinker. The iPad removes all those frustrations, and in the process closes itself to tinkering, and I think that's an acceptable switch.
Other machines will exist to tinker on. Moreover, the iPad itself is opening to tinkering. If I'm a young kid who finds out online I can download a jailbreaker and completely hack up my iPad, that's exciting for me! That gives me an opening into the world of tinkering and fiddling that you have with these computers by default. Or, if I have an idea for how to excite people into learning how to fiddle with computers, I make an iPad app or a webapp that teaches them all those things. As I said in the article: If nobody else decides that would be an awesome thing to do, chances are I'll make one myself, for my own sake as much as for others'.
I understand the criticism that the iPad's getting for being closed. I've been a member here for however long. And to some degree, I sympathize with it. But people here are fucking ridiculous. (Not just here; Reddit and MetaFilter are just as bad.) They jump from "I wish it was open" to "The fact that Apple's closed the system is killing computing forever and plunging us into the dark ages."
I wrote this to Alex Payne in a rougher, impromptu format. I just wanted to explain to him why I didn't think it was totally bad that the iPad was closed. When I finished writing it, I liked it, so I rewrote it for my blog readers and added that little smug "Programmers aren't permitted to feel my breath on their skin" character because I thought it was really fun and because I have readers who enjoy irony and tongue-in-cheek. Then it got out to a wider public, including certain venues where people didn't know my name or my writing style, and now we have this discussion going on.
I hope this will stop certain of the people here from jackassing themselves about. (Not you, fnid; your comment was a great response to an attitude I don't hold.)