Yes, the new rotary jets will retrofit to the older spas- that's the actual moving part.
But, as far as I know at this point, the SS trim rings will not retrofit. I am waiting to get more info from the factory about the possibility of swapping out the jet faces. At this point it doesn't look like they will fit the older jets.
PS - Jeff, The Christmas card you sent us was one of the nicest I have gotten in a long time. Thanks, and I hope you have a great new year.