The most significant investigations of wireless power on a practical level are probably the various SPS (Solar Power Satellite) concepts that have been floated in recent decades. The idea of collecting some huge amount of power using solar arrays miles across and in Clarke orbit, then beaming the power to an earthside receiver, has been seriously considered since at least the 1960s.
Is it possible? Yes. Practical? Yes, for certain values of, allowing for around 75% loss between collection and deliverable electricity. Achievable? Yes, in the trillion-dollar range. Safe? Not on your life, because the power delivery beam is arc-seconds away from being a particle-beam weapon of staggering power. The same would be true for any wireless power transmission system with enough capacity to power even a modest, high efficiency house.
And the one thing our future power systems can’t tolerate and must eliminate is high losses. Don’t look for wireless power much above cell-phone recharging levels over a few inches any time soon.
OTOH, we could use it to power our personal aircars.