"The problem is that nobody wants a more locked-down game console. What we want is a more open one. "
Perhaps you're not familiar with how Sony, Nintendo and Microsoft operate their console businesses, but their consoles are all much more locked down than Apple. They are much more restrictive of what they allow onto the platform, and they demand much more money from developers; Apple's review process is a piece of cake compared to getting anything through Nintendo!
Of course, all consoles are more locked down the desktops - Mac and Windows and Linux of course you can install whatever you like from wherever you like. But that's not how consoles work - they're all much more controlled/organized. :-)
Google Play, if it were on consoles, would be an example of being more open. But so far when it was tried (Ouya) the result wasn't good. Not sure that the open-ness was the cause - they also didn't make marketing muscle. But it does show that "open-ness" didn't get either developers or consumers to flock to the platform. And Google Play is tiny compared to Apple's App Store on tablets and phones. So while I like open-ness, it's hard to find proof that it wins over a well run, curated model.