Gruber:
Put another way, there is something called “Android” that truly is open source, in the “take this and do what you want with it under this standard open source license” way. But that “Android” doesn’t include all sorts of things that we, as users, think of as being part of Android — things like Google Maps, Gmail, Android Market, etc. None of those things are open in any sense of the word, but all of them are essential aspects of any consumer phone or tablet running Android.
Reading this, I immediately thought of Darwin and Apple. Sounds like Google is edging Android closer and closer to exactly as open as iOS: there’s a core operating system down there that’s open (in the typical open source sense). But if you want all the good stuff that really defines the platform you’re going to have to get in bed with Google/Apple.