I skipped S2 to S006 "upgrade" because I considered that the new features were nice to have but not worth the extra costs.
For me, the "mobility" and versatility of the S system is important. It was the main reason why I picked the S and not a back + tech camera (I looked at this alternative quite closely when making my initial purchase decision). So any thing improves that (such as more frames per second, image stabilization etc.) would be great. Conversely, I would be quite critical as regards anything that would reduce the versatility of the system (and this despite the fact that I use the camera more and more often on a tripod).
Similarly, I love the files from the CCD sensor. They have a particular look and feel that makes them come to life. Of course, the sensor has certain limitations, notably as regards is high ISA capability (or lack thereof), and it would be nice if a new model would bring about improvements in this regard. But not for the price of compromising on the base qualities. Frankly, I care less about how a file looks at ISO 2,500 than how it looks at base ISO. And for really low light, I either use a tripod of the MM.
For a couple of years I thought that more MP would be nice, but I am much less certain now. And, if more MP means less versatility: No thank you very much.
As regards price, I have no hope that the new model will be significantly cheaper. And, if yes, I will be presently surprised and :clap::clap: Leica!
Anyway, I planned a stop over at Photokina when returning from a business trip.