Some of my questions would be:
What is the long term Supercharger goal beyond the 2015 map?
Do you envision continuing the Supercharger rollout across the U.S. Interstate and highway system and to what degree? At what point is it completed?
How do you envision future charging (10yrs from now )for Tesla owners who are not near a Supercharger while traveling, I mean they visit Aunt Debbie, have 10% charge left and now need to charge. Running 30 amp extension cords from your Aunts dryer is a bit tacky, What about us with gas dryers?
Do you see public Superchargers at Major gas Station chains for the 20 min "fill up"? will they still be at no cost to Tesla owners?
Is your plan to gradually install Solar panels on the majority of all Superchargers?
What is best guess on battery power in the next 10 years? 110kWh, 125kWh, 150kWh?
What is your outlook for charging time in the next 10 years? 5, 10, 15min charging?
Will charging at home always be limited to, say, several hours?
How do you see those who only have street parking being able to charge?
Will Tesla and SolarCity eventually have a "Package Plan" "Bundling Plan" available? Solar Panels, home battery storage, Tesla purchase all bundled together?
Elon has mentioned a maximum of perhaps 6 different models of Tesla cars, We see the current 4dr full size car, the SUV, and the Model E, what do you see as the other three?
Who do you think will be the first Manufacturer to offer a serious competition for Tesla?
Does any other manufacturer have technology even close to what you currently have?
As Model E is released, how do you see delivery taking place. Is doing a personalized delivery as you do now feasible when there are 150,000 cars that need to be delivered? Is that when Tesla Dealerships come into play?
What question would you ask Elon and the Tesla Team?