Plarail real class

So these new trains will have the same general proportions as Plarail, but with a realistic track system (like Super Rail but smaller) and a higher loading gauge to allow details like full pantographs? Some of the close ups show the power units still have traction tyres, so could it be they have friction (flywheel) motors or another alternative to batteries? Pull back would be impractical for a train and there's no wind up key, so surely there must be a need for the tyres. The new track looks really good, and it should have at least as many pieces as the early TrackMaster if not the normal blue/grey type.