Okay, guess that makes sense; personally I wouldn't mind having this dual usage but maybe it would make the W3 spec people throw a hissy fit.

Interesting attempt I must say but I think it will be hard to actually get it out there. Too much legacy stuff in the way.

It's a bit like how for a really long time a lot of fancy new VOIP protocols were really hindered by the lack of proper NAT support leading to all these horrible workarounds to do NAT hole punching or more RFC's like STUN and TURN.