The future is not uncertain. We know that todays vehicle park, fueled by gasoline, diesel and etanol will exist for a great many years ahead.
What concerns other fuels, there are solutions for them too. If electric vehicles will be most common, there are different scenarios. Fuel cels needs Hydrogen gas, which can be refuelled by our Drive-Thrue existing units, in another configuration.
Batteries does go through sreious upgradings, but the time for recharging is still not improving, and there is no reason to have expectations for a quick fix in that area. That is why Drive Energy offers battery swap in automated Drive-Thru units. It makes it reasonable to travel longer routes than 400 km (250 miles) without long recharging stops.
Read more under Electric Vehicles.