That makes sense to me, as I read the article it sounded like he was saying that outside iOS he was locked in to Flash in the same way as he is locked in to HTML5 on iOS.

The iOS restriction is very real and enforced, there is nothing forcing people to use Flash for any popular platform.

However if you put it in terms of "if I want to use Flash, I'm forced into Adobe's implementation" then I can see that argument.