What a great concept especially the design of the tabs, not something I would expect to see in a browser, but you pulled it off and it goes very well with the rest of the Metro UI-esque style of your concepts. Great job!
Wow!.. well i hesitated alot before posting this. As this is a very rough concept. Im not to sure myself how this would be usable as a live design but went ahead because of consistency issues with Old Aero design. Thank you your comment means alot!