The M is a marvel of neat features, I'll grant you. None of which happen to appeal to me, but no one's being forced to buy the add-on gimmicks, and the built-in features seem quite unobtrusive, or at least hopefully they are, and who doesn't want to use them can just forget they're there. Given it costs the same as an M9 did, it's not like Leica is forcing us to pay for all that froufrou. Hopefully it's not easy to accidentally press the Video button (as is resides right next to the shutter release) or activate Live View.
I can't state for certain I'll never buy one. I'd need to actually use one before I made that decision. I'm a little surprised that in all the banter about gimmickery like live view and EVF's, the question of IQ hasn't even come up in threads. No one seems to be wondering why the megapixels are so far below the bar set by the D800. People don't seem to be discussing why the high ISO limit is only 6400. I'm sure that will come later, when we actually know how the camera performs.
But one thing I can say for sure, and I say this as someone with a boatload of manual-focus lenses of Pentax, Nikon and others, is that being able to use them, awkwardly, with no auto-aperture, and the same EVF used on sub-$1000 Olympus consumer mirrorless cams, would not be high on my list of reasons for buying a $6800 rangefinder camera.
For me to buy it, the M would need to seriously outperform the M9 in IQ. Even then, it's arguable whether such an improvement would actually translate to better photography in practical use in my hands.
So if that's being negative, I'm sorry to suck the red out of anyone's apple.