Earlier quoted context omitted.
If you read the article, he's not making that assertion about the relative worth of Android. (And opening up with that as the basis of your argument is a disingenuous tactic, if done intentionally.) He's arguing that the third-party software library is weak, especially away from "enhancement/tweak" type software. Flexibility is useful only insofar as it translates into capabilities of high value to end users. It's no…
The killer app for both platforms is the web. This is fairly obvious if you remember the original iPhone had few apps and was widely considered a poor phone (or cameraphone). The iPod was the third leg of the original announcement but it's hard to see that as a killer app when an iPod was available stand alone. I'be never heard exclusive be a necessary feature of a killer app before this. It's more like a console fan…
"Exclusive" is maybe too strong a word, since it implies that no other platform will ever have that Killer Feature / App, e.g. Halo. But if only one platform has it when you need to buy, it's for all intents and purposes an exclusive.