HTML5 and CSS3 Readiness Across All Browsers [Infographic]
Source: http://gizmodo.com/5537228/html5-and-css3-readiness-across-all-browsers
This graphic isn't just beautiful; it charts out every major browser's compatibility with elements of HTML5 and CSS3. In a nutshell, things look pretty good. For the fully interactive version (the one that makes sense), look here: [html5readiness via infosthetics]