I have just rewritten my personal resume web page in HTML 5 and I like the simpler, less cryptic syntax of the head part of the markup.
But apart from that, what are advantages of HTML 5 over the good old HTML 4.01? As far as I know, there is no support for HTML 5 in legacy browsers (Internet Explorer earlier version than 9) and because many people still use those browsers, I would still have to use flash workarounds for video tag or similar HTML 5 features. It seems just like a lot more work than just to use HTML 4.01.