I am at the HTML5 Developers' Conference in San Francisco. One of my friends said "it must feel like Christmas for you over there" and it actually does feel that way, not in the sense of "everything is easy now" but more in the sense of "our path forward is clear." Like Christmas before a year-long war we know we will win.
Paul Irish spoke this morning about the various tools he's using these days, or as of 10/16/12 (one gets the impression he'll be adding a new one tomorrow), so certainly things are more mature in terms of the "tool chain" (in the old days we were waiting for "tools" to simply get plural, as text editors reigned supreme). Now we can say there are ToolS for HTML5. Cool.