New type of motor with 2x the torque density, and 3x the power density of standard brushless motors. They seem to get this with a clever arrangement of magnets. Currently aimed at electric vehicles, however we are always looking for higher performance actuators in robotics due to the space constraints. It will be interesting to see if this technology spreads to robotics as well.
How small can it conceivably be made?
Not sure, their animations aren’t very informative