We're entering a new era of the web. To the ignorant masses, this transition will go largely unnoticed; they'll enjoy increased usability and convenience, with more robust functionality and more relevant data at hand. And they'll mostly just take it for granted.
However, for web designers, front-end developers and data system programmers, we have a lot of work to do.
Why HTML5?
Why indeed? As someone who's worked almost exclusively with Drupal since 2004, my nose has been pretty much in xhtml 1.1. Back then, moving to xhtml took some learning and patience on my part, having played with basic HTML since 1995. Now xhtml feels like the familiar friend and HTML the ugly cousin.
But then I started really looking at HTML5. And the more I am learning about it, the more I am appreciating how HTML5 looks to be a real game-changer.