Caniuse has a great collection of visual ref tests, side by side with the Modernizr feature test.
This allows us to visually see these features and verify they match our feature tests.
Everything in the caniuse suite works, except for the audio/video tests.
The huge benefit is that now we can screenshot this one page (on a mobile device per say),
and get the full rundown of its features, even being able to point out any false
Thanks Alexis Deveria for creating such a great collection of tests. :)