Yep. Struggling to see the difference between this and the 2600+ beyond the wireless controller support. Stella in a less iconic box. The wireless CX40s apparently work with original '70s 2600s. That's pretty cool.

Something like polyglot markup? http://dev.w3.org/html5/html-xhtml-author-guide/html-xhtml-authoring-guide.html This relies on the fact that XHTML markup is actually valid in HTML5. It may have taken them seven years to catch up with you, but they're there now. ;)