I feel HTML5 today's "Web 2.0" of a few years ago. It's an overblown term that doesn't really capture what it is. CSS3 is cool. Canvas is cool. More native video is cool, I guess. The other new html elements are... ok... but quite frankily I'm fine with <div>s and changing them to <sections> seems annoying more so than helpful. HTML5 doesn't seem to bring anything radically new; most of what it allows could be done before, just with more workarounds and quirks. It's being hyped up as some next great thing, and not really a radical new development, it's much more incremental really.
And plenty of people are still using IE8 and Windows XP, and will for the next few years, so I don't think it's really more critical to learn HTML5 than over HTML4. Actually, it's hardly even possible to learn one without the other.
And plenty of people are still using IE8 and Windows XP, and will for the next few years, so I don't think it's really more critical to learn HTML5 than over HTML4. Actually, it's hardly even possible to learn one without the other.