I'm not sure if Hotel mode generates enough energy for the electric drive.
The aircraft is supposed to push back & taxi without the main engines (props : noise) running as illustrated in the first picture.
http://i191.photobucket.com/albums/z...g?t=1207130960 The engines would be started at a
TBD time and place close to the runway. Arrival the same: engines out after leaving the runway.
Idea is electric drive would ease environmental concerns / restrictions but also ease push back requirements, even allowing a certified cabin crew member to perform it, boarding the aircraft by airstairs after ground control approval..