well, the press release mentions that the 50/2.8 will have informative display like reproduction ratio etc but there are no LCD's...where will they be shown? in-cam? if not then it's at the barrel...no IF, booooo (not cheap)
The barrel extends and shows markings for reproduction ratio etc.
I can see this as a good compromise for making the lens more compact when focused at longer distances, but an internal focusing lens would probably be more rugged, or at least give that impression. No nano coating in the 50 MC so in two ways it seems a downgrade from the AF-S Micro 60mm (which is my favorite). However dpr samples show quite round out of focus highlights so maybe there is reduced cat's eyes (would need to test with similar subject and conditions to be sure).
I can see that in several Z lenses Nikon have gone for collapsing designs; this makes some sense if the objective is to make the kit as compact to pack for travel as possible. However, internal focusing and internal zooming lenses are enjoyable to use and at least for me they are easier to be confident about.
Nice to read that the 105 has little focus breathing according to Nikon's web page.