All in all, it's a distinctive expansion of the existing terminal without standing out as a wholly separate facility.
Also, as an interesting feature, it looks like an outdoor seating area either near or explicitly for a large restaurant on the east end!
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Here we clearly see that Gates E10 and E11 will have dual loading bridges with the "a" designation likely for premium passengers loading in the front.
The feature restaurant will have an interior "upper deck" for seating. Judging by the image here, this is surely going to get a lot of attention from the architects.
As a side note, the rendering mimics taking a photo of the restaurant from the second level. It appears that the secure area for arrivals from Gate 11, for example, will proceed up to a second level hallway, walk west toward an area above Gate 9, cross north to above Gate 8, and then west toward the Immigration facilities. That will give the east end a very open feel as an area of its own, i.e. the two-story ceiling will not extend the full length of the terminal expansion.
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I thought the concession layout was interesting, particularly as it includes the airport's first dedicated Duty Free store.
It may be fun to speculate on which Austin-area institutions may set up shop in the airport who don't already have a presence. And I really hope the airport maintains a distinctly Austin feel, i.e. few chains and more local establishments.