Converting that energy back into a usable form in the amounts we would need was the problem.
Tunable oscillating crystals that vibrate within magnetic fields seems to be the best way as long as they didn’t disintegrate from heat.
Dilithium crystals.
More like quartz, silicon and germanium. IN Europe they sell a wireless recharging system for phones and laptops we haven’t seen too much of in the US though we do have recharging “plates” for cell phones now that use the same “oscillation” techniques.
A rectifying antenna is a scaled up version of the above idea...tuned to laser light or microwave energy...they will oscillate within magnetic field coils which then get rectified into direct current electricity which gets stored and harnessed for power.
I'm sure it was "part" of the problem of practical application, but without a means of efficient transmission in free space...."ya got nuttin'.