I'm not a designer per se, so thanks in advance for helping me understand HTML5 better.
From my growing understanding of things, I generally look at HTML5 for two purposes: 1) the evolution of HTML4 for page markup, and 2) a replacement for Flash.
If I understand correctly, this group is more focused on the 1st purpose as it pertains to the markup generated by Drupal. What about the second, though? If I created interactive content with HTML5 instead of Flash, how would I serve that through Drupal? I know of numerous solutions for serving Flash, but are we waiting for analogous solutions to serve HTML5?
If I made gross errors here, please let me know. I'm trying to wrap my mind around these concepts.

Comments
The great thing about HTML is
The great thing about HTML is that it doesn't need any adapter. You just serve HTML. The core function and purpose of a browser is to read and understand HTML, so there isn't any need for a plugin.
If you use parts of HTML that have been introduced recently, some older browsers will not recognize those parts. There is a site that helps you figure out whether there is support for your element in a certain browser, http://caniuse.com
I believe what you are referring to when you talk about a Flash replacement is the canvas element. Here are the results from caniuse, http://caniuse.com/#search=canvas
A lot of dynamic stuff can be done with CSS3 transitions and transformations as well, some examples here, there are lots more you can find around the Web.
Lin, That is what I call a
Lin,
That is what I call a crystal clear response. You've helped me understand this so much better, thank you!!!
Next step: evaluate our target market(s) to ensure HTML5 is a viable tool. After that, prototyping.
Thanks again!
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Happy to hear that, you're
Happy to hear that, you're welcome :) Good luck!