It is new, as is grass's immunity to "powder/spore" moves and electric's immunity to paralysis. It doesn't state abilities, but it wouldn't be surprising as ghosts are supposed to vanish or move through objects at will.
You have to wonder if that will send Honedge's stock up a little bit. I mean, Magnet Pull isn't huge, but a Steel type that can switch in and out of Magnezone (or Magneton for lower tiers) may not be all bad.
But then you realize halfway through your post that Steel lost its resistances to Ghost and Dark, and Honedge will therefore be useless after all. Crisis averted.