My main takeaway from the article, that I hadn't seen in detail:
The Gravity also offers a head-up display, something the Air never had. It's more than just a projection of speed and other items of interest, because it also includes augmented reality cues. This laser-enabled system can project lane lines and the position of the car ahead, even if the road is partially obscured by fog or rain. With guidance active, it also points you into a turn, confirms that you're on course, and gets you ready for the next one.