It is, but keep in mind that for weight efficiency the LiPo batteries are only protected by a heat-shrink skin, no physical or fire protection at all. They will spontaneously combust quite robustly in a crash, or during charging of they are faulty or have been stressed in flight.
So they have to be charged in a fire safe manner, and (in a commercial setting such as a distribution centre) away from the main facility. Not beyond possibility, and again with changes in battery technology this will improve (LiFo is looking hopeful relative to LiPoon the safety front), but another logistical hurdle, so still worth mentioning.
