They miss a big point when talking about fragmentation: one thing what HTML5 is trying to achieve is to standardize the things which browsers _already_ do, i.e.

They miss a big point when talking about fragmentation: one thing what HTML5 is trying to achieve is to standardize the things which browsers _already_ do, i.e. to document current behavior where it is consistent and to make it as consistent as possible if it is not. It is the work largely based on how web and browsers work _now_, so the result will be quite an opposite to fragmentation.