Didn't you hear about the recent "fusion" breakthrough? They powered a 60 watt bulb for 3 minutes with it!
THAT is the answer! It ought to be ready for widespread applications in about 30 years!
The article I read said it could power a whole house on something smaller than a breadbox for over 100 years. It's taken like 90 years to get to this point. It'll be another 100 before another baby step.