Although I agree with Gruber's overall point, he lost me with the last, bolded sentence. We iOS users didn't "magically" have access to the full web and HTML5/video/animation playback beginning in 2007.
It hasn't been until that past year/year and a half or so that I've been able go to about 90% of my favorite websites and actually get HTML5 compliant video and animations on pages instead of the broken Flash icon. So to say that we've been benefiting since 2007 seems a bit disingenuous.
That is unless I'm not understanding his statement which I probably am
I think the benefit he was referring to was not the eventual arrival of HTML5, but the exclusion of Flash. From the intro of the iPhone, iOS users have been enjoying more efficient and less power hungry devices.