At CERN, we try to discover how gravity is connected to matter: learn to harness energy from gravity.
A few times in human history there seemed to be an endless abundance of energy; steam, oil, nuclear. Human nature has however remained unchanged, we all still struggle along in life.
If you don't explicitly forbid for something to occur, eventually it will happen. Information systems growing into all encompassing system.
How to retrofit suburbia to become a more humane environment.
Endless energy would first be aimed at basic sanitation, clean water etc. Only after that we engage first world preoccupations. The case may be that human nature is going to overcome any benefit we can produce.
Endless energy can also be interpreted as systems using almost no energy; laptops running on just a rolled-up solar panel.
Getting high energy density storage at affordable prices is one of the ugly elephants in the room for this subject.