I'd like to throw this out to the more knowledgable members of this forum. Seems like batteries are getting smaller and more powerful every day (at least the ones that don't explode on new airliners not to be named! 
) Moreover, as train operations are moving in the direction of command control as opposed to track voltage control, would it not seem reasonable that the next step would be to free operators from the need for track-based power? I know that open-frame motors are power hogs, but can motors are not. Anybody seem where I am going here? Thoughts? I speak after spending several weeks wiring a layout to ensure consistent track voltage (I'm using super-o, so, yeah, I know, I know).
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