A post a while back talked about nosewheel tugs that lift the whole nosewheel and move it around.  That post can be seen here.  I commented then about how large the tug was.  I hadn’t then seen that there are far smaller versions of the same concept.  This one is in operation at SeaTac.  It is suitable for narrow body jets and regional jets.  I don’t know whether it is being trialed or whether these will gradually replace the traditional tugs.  I guess we shall see in due course.