This has been proposed before... Worth checking the archives for the arguments that were made against it then.
Cross-referencing with Chrome's bug tracker: http://crbug.com/172553 :bz can you please point me to the previous proposal? I did some cursory searches and couldn't find anything :(
Don't have a link offhand. If you can't find it in the whatwg and public-html archives, then I might just be misremembering.
:bz I was only able to find this MSDN page, which looks like a very different old proposal. http://msdn.microsoft.com/en-us/library/ms970704.aspx Maybe this is what you had in mind?
No, that's not it.