The first picture in this thread is the factory exposed carbon fiber option ($1995). The picture below that is photoshopped, with the "painted halo bar." This is not a 2014 factory option. The picture below is the factory, optional transparent top.
GM is delighted with the demand for the exposed CF top and is thinking about additional 2015 CF options. One of those could be an exposed "halo bar," with the exposed CF part being the same width as it visually is in the current exposed CF removable top.