Interchangeable sensors from Nikon?

Nikon

It seems as of the clever bods at Nikon are thinking of introducing an interchangeable sensor somewhere into their arsenal, likely in conjunction with a mirror-less camera. At least, patents have been filed in Japan for an interchangeable or removable sensor that is fitted along guide rails.

A chance to play swapsies with sensors from Nikon?

My little brain is racing to consider the possible uses for a sensor-swapping mechanism. Any thoughts from you guys?

(Headsup to Nikon Rumours, of course.)