Skepticism is always warranted for new things, but also remember this is the guy who made EVs viable and cool and luxurious, as well as they guy who made reusable rockets a thing, to put it mildly. Elon Musk has a brilliant mind for solving engineering problems that others think are too daunting to even approach. "Seeing around corners" is something fairly simple, especially when you consider Tesla vehicles have myriad sensors for detecting objects/vehicles on the road, even through other vehicles. Teslas can stop when the car ahead of them stops--surely they can provide a driver with a (near) real-time view of where cars are in another lane, ahead and behind the vehicle.