Nikon displayed some new prototype/concept cameras as part of the Hello Demain (Hello Tomorrow) exhibition at the Cité des Sciences et de l’Industrie (Paris, France).
The first Nikon camera prototype has three interchangeable pieces - LCD screen, lens and a grip:
Nikon Multi-Ball - "multi-views that can capture the atmosphere of a scene". No idea what this is, probably some kind of a 3D-panaromic-plenoptic-camera:
The next camera prototype has a 6 inches screen and adjustable lever:
I could not find any information on the Nikon i-Ball: