JavaScript, on the other hand, has seen a huge emphasis on performance, with Google's work on V8 and the stuff Apple has been doing with Webkit. I strongly suspect it'll be better performance than Flash.

Not that I like Flash, but that's for different reasons.

Except that using a cpu to emulate things gpu do natively requires far more power. A gpu is a specialized processor so the tradeoff isn't going to be 1 to 1.

There is absolutely no empirical basis for assuming this. In actual comparisons between the two -- at least the tests that I've seen -- Flash take the lead.

Removing Flash and being saved the overhead of endless and overbearing ads is good, but as has been said the advertisers will move to HTML5 (they already are), and they're going to do the same full motion video, moving dynamic multimedia, etc, that causes Flash to be such a beast. Worse, it won't be as easily segregatable because to the browser it will be no different than the rest of the web application.

On the other point, any website that lets advertisers take over their content or more space than it should because there are no boundaries (as opposed to Flash) is a website I won't visit anymore, and I suspect a great amount of people think the same.

We have great advertisement providers as Fusion and Google are which are non intrusive. If you wish to add banners and the such you as a content provider should very well be on top of your ad space and avoid shady advertisement companies.

  > Worse, it won't be as easily segregatable because to
  > the browser it will be no different than the rest of
  > the web application.