Nikon are doing well building out there Z system glass, we now have the three key f/2.8 zooms they are famous for; the 14-24mm f/2.8, the 24-70mm f/2.8, and the 70-200mm f/2.8. These three lens are as good as they get.
They are also building out an f/4 range which is actually more interesting to me. Smaller glass with the Z system appeals. Would like to see a 70-200mm f/4 but its not yet on the roadmap.
They recently released some much need micro glass and I would like to see some tilt and shift and selective focus which would complete the speciality glass. It seems now the concentration is on longer glass with a rumoured 400mm coming soon. Personally if I was getting the Z system I would be waiting for a 85mm f/1.2 but knowing how good the f/1.8 is it would be a toss up.
Canon with their R system, took the route of releasing the pro f/1.2 prime lens first. Nikon have been releasing pro f/1.8, are now releasing pro f/1.2 but are also now starting to release a budget range of pretty good lens. The new f/2.8 28mm and f/2 40mm are the first in this new range. Coming in at £250, there decent lens a good prices. So we will soon have three options depending on your price point.