With today's announced updates, tesla.com/autopilot refers to a total of 8 cameras. The Model S ordering page makes it clear that "Enhanced Autopilot" comes with 4 cameras. "Full Self-Driving Capability" unlocks the other 4. What's not mentioned is which 4 are in Enhanced Autopilot. I'm assuming that these 4 are the 3 front facing, and the rear-view which is now used for Enhanced Autopilot. I'm curious how (if at all) this improves blindspot detection. It seems like a combination of rear-view and improved ultrasonics could make a real difference here. What's confusing to me is that this is described (on the order page) as helping to "see fast-approaching vehicles in adjacent lanes". For this to be optimal, you'd presumably want the "Rearward-Looking Side Cameras" that cover a larger arc and distance. Anyone heard anything definitive from Tesla on this?