i think its more that they have been developed enough to be more fuel effiecnt way of starting an engine than bleed air, rather than the use of the idea.
will have big benifits to fuel burn if engines are allowed to be started on stand, cutting down on apu use.
guess most ground power systems will have to be upgraded, we currently have 120kva ground power, most a380 units that i have seen are 180kva, not sure if that be enough for engine starting a large by pass engine with the new electric starters.

