From behind too...It also says in the Autodesk title at the end "for event"...maybe for TGS 2012. Probably they are going to announce an update or a new and last DLC.
Hang on, hang on. This is a regular BRZ, yet the object URL is BRZ_sti_concept.
Observe the list on the right of the picture (which I quoted for ease of reference, apologies), that shows:
Note that "last" (or whatever it actually says) is the only one with 'V' to its left, so it's the only layer currently visible.
Anyway, what's interesting is that the model presumably contains the visual mods as separate layers, namely the wings and such, but if "last" is just the stock shell (and interior?), what are the "step" entries all about? And "trace"?
As such, it's easy to assume that the STi version is achieved simply as a modified version of the base car (which we all suspected would be the case), and that this is either early in its production, so it still looks like the base car, or the STi-ification is hidden in the other layers.