Batteries are both lossy and environmentally problematic objects to manufacture and dispose of. Also, a good fraction of all the energy used by society is spent hauling around energy storage. Wireless power would help fix both these issues even if it was fairly lossy compared to a copper wire.
I doubt wireless power will catch up to the efficiency of battery power any time soon. Batteries have been around a long time and have the ability to time-offset local renewable energy resources such as solar power.
Even if it's got some sort of feedback that allows it to be a highly concentrated beam between devices it still seems to me it'll be very lossy.
Loss in the air. Loss in transforming the energy twice more than normal.