Good things come to those who wait - and so it is with HTML 5, the new generation of code. A simple preview is available at A List Apart.
An intensive discussion is provided by Mark Pilgrim in an amusing article, Dive Into HTML.
What we all worry about is browser support if we are brave enough to use the new HTML 5 and CSS3. Read Taking Advantage of HTML5 and CSS3 with Modernizr by Faruk Ateş. for an article that could be titled "what me worry".
Or be patient. As Sam Cooke said, "Change is gonna come."