You are correct. Summon can be improved by using the camera as well as other sensors. I expect we'll see that in the future. The other problem is a UI issue, from my perspective. Summon will automatically move forward after two presses of the stalk (one press is park). With being so easy to confuse with a park command, I think it would be imperative to have the user select "forward" or "backward" for summon to start, instead of assuming "forward". Otherwise perhaps better indication that the summon feature has been initiated?