I think they are just hyping up Chrome as an HTML5 engine (and doing it wrongly) as that's the main browser known for it's HTML5 (thanks in part to Google's AppStore/AppSpace/HTML5 games).
Opera might be just waiting for Facebook/their replacement for Unite and Firefox has been promoting Personas for a while now.
None of the big browsers just do what they do anymore.
It would be interesting to see if this is what browsers like Flock have been waiting for especially as the tablet market has shown some bad but interesting minimal browsers.
The most annoying thing is that search is just dead. You don't have a universal extension search so you can't even find out which exclusive extensions most browsers have and they keep changing names. Opera extensions, Firefox Add-ons, Chrome Apps. It's what allows these companies to get away with messages like these.