http://html5test.com/index.htmlScreenshot too long and too high a resolution to embed...see here instead;
http://forums.voiceofthepublic.com/smf2/gallery/1_09_06_12_9_02_32.pngIn case you are wondering, I was using IE9 in the screenshot. We control ALL content by filtering/manipulating all of the TCP flow in both directions via local proxies and our IDS wares. IOWs, we can see anything we want to see but we choose to remove the garbage like tracking, ads, insecure scripting, etc. I can also manipulate or rewrite(tamper) with any request/response.
Another kind of example;
http://forums.voiceofthepublic.com/smf2/gallery/1_09_06_12_9_39_57.pngAre you prepared to defend against the inevitable insecurities of HTML5?