Well, I don't think this support is going to change the web overnight. I think for a long time
we will need video plugins like mplayerplug-in, gecko-mediaplayer or totem to handle websites.
As the developer of mplayerplug-in and gecko-mediaplayer I see many sites that still use the
older tags and are in no hurry to change. I also have been noticing that most video playback
is moving to flash (except for MS sites) so that is emerging as the standard at the moment.