A Pancake lens and I hardly care what focal length it is. I just want something small and light so I can carry the camera everywhere. I don’t mind if it’s manual focus, it’s about portability. The S might have twice the size of sensor compared to an M, but compare a 35mm S to a 35/28mm M lens and it’s scale gone mad.
6 months ago, I talked to Stephen Schulz about a lens like the Mamiya 80mm f1.9 and suggested a Summicron would be ideal. It may happen one day, but the development plan is already in place for several years.
I firmly believe that a small lens, or two, is essential for the expansion of the S into amateur markets. I believe the amateur market is needed to support used S camera pricing and reduce the cost of ownership. It’ll open up the market and increase volumes, IMO.