Didn't want to get too far with this to avoid derailing thread into an AI one, but once you are not restricted with human body you can get a lot more done with much less energy. But that's just some orders of magnitude and it does not matter that much with the exponent.

So what do you use this energy for? Probably want to know more. Energy is necessary for computation but that's pretty much all what universe is - energy and mass. If you know the process of harvesting it (technology = information) then it's not like you need to do some work. The idea of doing some physical work to get something done is getting deprecated. Once you know exactly how to do something, you can set it up. Information becomes results.

So what if there are others that also want to have access to the energy and mass available in the universe, some kind star wars scenario? Technological progress destroys raw power, so it's about who can develop faster. Progress is done through computation. For computation we need algorithm (=information) and energy. Amount of energy influences speed of computation linearly. I'm making an assumption that with algorithm improvements you can do better, much better.