My 2015 Genesis ICE sedan had that. One of my neighbors was convinced that there was a drone hovering above the car. ;-)
If you look at a car with the feature, you should notice a camera in the front, one in the back, and one on the bottom side of the rear view mirrors, The cameras are wide angle that would have a fish-eye effect but AI corrects that and stitches the images together to make a more realistic view. I find it very helpful for parking in tight places. My wife's Santa Fe SUV has a feature that lets you use the key-fob to stand outside the vehicle and slowly move the vehicle straight back or forward. That is very useful for tight parking spaces, as you can park, back out and exit, and then inch the vehgicle forward to its spot, without risk of dinging car doors.
I personally, much prefer the camera stitch way of doing this. My Tesla accomplishes the effect by using the cameras to make a raster image that is vectorized to show a graphic representation of surroundings. You are presented with a digitized blob of your surroundings that kind of works but is no where near as precise at the images shown in a normal car.