This is a really impressive effect, but I'd hesitate to use it as part of a generic cms backed site since the auto-sizing could inadvertently editorialize the meaning of a headline at different page widths.
"Roddick SURVIVES, Staving Off Retirement" vs "Roddick Survives, Staving Off RETIREMENT"
I do not like language {X}, but I do like language {Y}. Everyone should agree to write in language {Y}, so that we can all pretend that language {X} does not exist, and maybe then browsers will just start using {Y} natively.
There are some fairly clear indicators from Adobe itself about the future of dreamweaver.
Note what they say in the 'Code' section here: http://html.adobe.com/toolsandservices/
"We think there’s a need for a different type of code editor – we’re working on something and will have more to share soon."