Hi there.
What you're describing is something we have thought of doing many times, but have never come around to do it, mostly because we're not there yet. Keep in mind that this is still a project in its early stages of implementation, the prototype browser doesn't even have scrolling or integration with JS (or similar) at this point.
On the other hand, nothing is set in stone. We have identified many flaws and problems with the `old standard`, but that doesn't mean our proposals for an alternative are perfect. I'm sure there are still many gaps to be filled or improved. So if you want to see the `new standard` advance to a state in which we can easily compare one thing against the other, please help us out (finding bugs in the prototype browser, writing tests, writing tutorials, writing sections of the specification, improving the website, adding more info to the wiki, implementing your idea for user-submiteable example gallery, etc etc etc, so much stuff still to be done), instead of just bitching around :P
Cheers,
Miro