It looks neat and might help in emergencies or special conditions, but if one takes a look at the wattage, sadly... 50 kW is very limited power. Probably not good for widespread use.
The helium-filled S500 blimp ascended to 500 meters above ground in the city of Jingmen, generating power at a rate of over 50 kW, according to Beijing SAWES Energy Technology Co Ltd, one of the developers of the system.