For another interesting read, I found this guy's article to be very informative and quite fair in comparing the two technologies: The Flash vs. HTML5 Endgame | VisionMobile :: blog
While I agree that with the two headed monster of Google and Apple pushing HTML5 in a big way it is almost inevitable that the future belongs to the new technology, it should be clear that this is still a LONG way off. In case people don't know, the final HTML5 spec won't be finalized until the year 2022. There are still a ton of issues to be ironed out before HTML5 will replace Flash. Let's see .. year 2022. I guess that means we will have full web access with iOS when the iPad 12 is in our hands.