Well, I saw the roll out last night and was impressed with the new M the most since that is my thing. It weighs in at 680 grams and feels slightly heavier than my MM that I had with me.
At 24MP who knows what the images will look like but it seemed to me that Mr. Kaufmann stressed that it was mostly an in house endeavor and liked that he stressed it was a EUROPEAN sensor. I hope it renders like the CCD in the M9, i.e., warm. The native ISO 200 is a welcomed sight. Time will tell where the ISO breaks down before you hit the new ISO 6400 limit. I can tell you increased ISO has made me a fan after using my MM.
The new rubber seals could be felt when mounting the new GPS hand grip. I do not like the silver buttons on the black model so you silver guys might go for this one more than the all black guys.
The focus assist in the front via a silver button really helps by outlining in red what is in focus. I even tried an 800mm APO monovid with adapters for the new M and the focus assist was spot on. The 800 8.2, f like 7.9 (!), costs Euros2500 and the M tube like Euros 880. There is a bayonet to screw in adapter for this setup that is a prototype for now with no pricing until early 2013.
They were demonstrating the M adapter with a 28-90 ASPH 2.8 R lens that seemed huge on the M (when compared to the new APO 50) but worked well and I can se me getting some R lenses.
The EVF is the same one the X-2 uses, BUT the LCD is finally bigger at 3". Next to my MM I did not feel it was that much bigger now that I am used to the M9/MM 2.5" screen.
I am NOT into video, but had to give the new HD a try. It was easy to turn on by hitting the silver M button on top to the right of the on/off switch. After using the 35 FLE on it the video images were to my eyes about the best I have ever seen and now I have reason to finally get rid of my Panasonic HD video. M lenses and video do make an impression. The sharpness achieved on a simple 2 minute video blew me away with the clarity/sharpness, etc.
More later and some pictures too.