Wow! This is mesmerizing. These posts on HTML5 stuff that pop-up on HN from time to time hint on what is to come on the web in the near term. I think HTML5 is a huge Tsunami gathering energy and steam out there! It will and should beat all these "I-am-the-best" closed systems (already does in some areas) sometime soon, and be on the top. System agnostic, immersive, inclusive, what not. Love it.
The bad thing is that there will be no technology competition. Just HTML and JS for everything? Boring...
I seriously doubt that the world will stagnate at HTML and JS. Thing will evolve!
Though judging by adoption and advancements from W3C, it might be thousands of years ;).