The S2 camera is for Leica more an Formula 1 exercise (a Leistungs träger) and will presumably generate more excitement than profits.
The M community waits for the M9 and when this will be announced it will generate a disproportionate amount of interest and discussions, but will not send the buyers in droves to the shop. Stripped from emotion and nostalgia, it is and will be a niche product. I will buy the M9 as a blind date, but I am an aberration I have to confess.
The main focus of current and future buyers in the high-end photographic market is fixed on only one thing: a dslr with a 35mm sized sensor and lots of features and a huge system of lenses and accessories. This is the terrain where the announced R10 will have to do battle. If the Leica company wants to survive, the R10 will be the lifeline. That puts a lot of pressure on the design team.
If the R10 is just a product comparable to the main dslr competition, it will loose on momentum if not on excellence. The Sony 900 will not succeed versus the Nikon D3x and the Canon models.