Wars tend to happen when power dynamics change. Either someone is on the rise and thinks they can get more or someone is on the decline and can no longer hold on to what they used to have. I think the middle east is going to be a blood bath once the oil stops making bank. But its not just them, when oil goes away it changes the power dynamics across the world.
It would need possibly big, vulnerable plants to refine, but so does jet fuel and diesel now.
Adding that much electrical capacity is a civilisational task, but an electrical "JP-8 at home" plant in theory is a good security asset, especially for countries with poor oil supply.
Will these still be relevant in 15 years time, given the pace at which military drones are developing?
Perhaps long-range drones/missiles will be using fossil fuel, but not nearly as much as the heavy, bulky military vehicles designed to carry personnel.