I am aware of the need for carbon removal and (some) desalination, but 1000x-ing our energy production is ludicrous stuff. The waste heat from energy production on that scale would render Earth uninhabitable.
That's roughly ten times the warming effect of doubling CO2.
Now, I don't have a climate model handy to simulate this in detail but I would suggest "render the Earth uninhabitable" is a close enough approximation to the actual effects to suggest it's a terrible idea and anyone seriously proposing it should be laughed out of the room until they've done their homework.
https://ourworldindata.org/energy-production-consumption
Most of that is lost in waste heat.
Total energy arriving on earth from the sun is about 1,500,000,000 TWh
https://smartstep.blog/how-much-solar-energy-hits-earth-per-...
7500 times higher