Reliably and efficiently transport energy generated in space back to earth, for starters
Or let me guess, its going to be profitable to mine crypto in space (thereby solving the problem of transporting the "work" back to earth)
It's always better to generate electricity on the ground than attempt to beam it to the ground from space. The efficiency loss of beamed power is huge.
Why would you transfer the energy to earth? The energy powers ai compute = $
Overview energy has done interesting work in this area.