Here’s an out there scenario - a few power generating aircraft or satellites in high orbit sending power down to drones at lower altitudes, and vehicles on the ground that just have inverters and motors. No costly batteries, let alone the logistical supplies required for fuel and maintenance for combustion. You are no longer limited by the slow moving fuel vehicles; a blitz is a whole other thing now.
Generators and solar arrays are the backbone of most forward operating bases - no longer. You have so much more freedom and space as you are no longer restricted by your power / fuel requirements.
It will shift the balance of war, vehicles, infrastructure, logistics.
For less military uses - imagine doing away with power cables entirely. No more costly infrastructure built above or below the ground. Just a few towers (much like mobile phone towers) transmitting to households. Depending on where the technology goes, imagine not needing batteries in anything anymore. You’re just hooked up to the wireless grid for power too.
It’s still in its infancy, but this is pretty significant.