I'm going to skip most of your comments, because if you're trying to equate "download amazon mp3s" with "run (binary emulated) windows apps (built for a different cpu)" you're clearly just looking to score points for the home team.
But as far as the "at least 54% of streaming video is html5" I had to laugh. Yes, I realize you linked to someone who said it was true so it must be. I take it, though, that you don't actually try to watch web video with nothing but an html5 client - or you'd never have felt comfortable repeating that. Statistics of course can be bent, and I'm sure what they're doing is weighting for volume - and since youtube has 18 zillion videos and supports html5 that's probably at least 40% of their number right there.
However, in the real world...
MeFeedia’s index includes over 33,000 publishers including Hulu, CBS, ABC, YouTube, Vimeo, DailyMotion and others.
Hulu: Hulu requires Flash Player 10.0.32 or higher. Please download and install the latest version of Flash Player before continuing. (Indeed, yes, you can pay $8/mo for a dedicated ipad client)
CBS: Should work on the iPad - sadly, it only gave me: This content requires Adobe Flash Player 9. Please click here to install it.
ABC: This content requires Adobe Flash Player - Ver 10.1. Click here to get the latest version of Flash (iPad? Download an app!)
Youtube: It works!
Vimeo: It works!
Dailymotion: claims html5 support but no video plays (FAQ: Why is the video not playing? You might need to update you browser's Flash plug-in)
So OK, 33% (or maybe even 50%-66%) of their main list supporting html5 is actually pretty good - and it's only 21% below their figure. The only problem? That list is slow pitch softball, every single provider on that list publicly supports iPad content in one way or another.
It almost makes you wonder, who paid for that survey?
Check a few more...
FOX: We're Sorry! You need to update your flash player
NBC: The NBC video experience requires flash
Al Jazeera: We're Sorry! You need to update your flash player
Comedy Central: To view this movie you need the Adobe Flash Player plugin.
Amazon Instant Video: You do not have a supported version of Adobe Flash, a requirement for watching Amazon Instant Video
PBS: To view the full experience of this website, please download and install Adobe Flash Player 9.
Metacafe: Needs flash
IMDB: In order to play this video, you must have Flash 8 or higher installed on your computer
Yahoo Video: Yahoo! Video requires a more recent version of the Adobe Flash Player.
etc etc etc
Obviously, I could list those for pages. I think you get my point.
All tests done with Chrome + VP8 & Opera w/ gstreamer h.264. I couldn't find my iPhone charging cable.