I've been slowly deploying pages written in HTML 5 with support for older browsers and enhancements that add value for users with browsers that support them. That way I've laid the groundwork for the future with good backwards compatibility. HTML5 is the future and I'd rather have the sites I work on be prepared now rather than have to do a significant redesign later. The specs aren't that mushy and everything I read shows a convergence in syntax support among the major browsers.
With Microsoft making a major push in early 2012 to bring XP users up to IE8 and Vista and Windows 7 users up to IE9 (who will be using IE10 soon thereafter), the time when the percentage of users running browsers that truly support HTML 5 and CSS3 starts to hit 90% is not far off. At that level, I'm all in.
Rick Trethewey
Rainbo Design
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