Jo-Erlend
Kristian Høgsberg (krh), a software engineer who works on the Linux graphics stack, started Wayland as a Red Hat project in 2008, while also working for Red Hat on X.
Anyway, I wasn't thinking of a browser as the 'only' client but it could become more useful in the future with tablets or mobile.
and... you are right saying "except for the ubiquity of the web browser". But I've not looked for html 5 video performance information and I'm probably not technical enough to determine if or what kind of hit it would cause versus a native client.