So the Circuit of the Americas web site updated their video about the track, and it includes more detailed renderings than before. One of the facebook groups broke it up into snapshots, and you can see it here:
http://www.facebook.com/media/set/?s...06702412746697
In the early renders of the buildings, I felt like maybe the "style" was just a result of very early plans that were primarily to show function, and that things would flesh out a little different. However, these new renders kind of continue with the style from before, and even expand upon it. I'm not sure what they are going for. There seem to be a lot of parallel lines... also, not a lot of shade. There doesn't seem to be much in the way of non-functional stuff. Even the observation tower looks like it is nothing but a support structure, almost like an antenna, drilling rig, or even carnival ride.
I'd be really curious about opinions from the more architecturally savvy folks here...