I also hope that video is included in the M10 for exactly the reasons jaapv describes. I also have used the M240 for these types of situations. And, it sure is amazing to use Leica lenses to capture the video.
But, I can always take out my iPhone, so I can live without it. But, the iPhone doesn't even come close to the quality of the M. Video will be missed by me if not included on the me M10.
It makes no sense to me to include LV and not allow the live stream to be recorded to the memory card. I'm pretty sure the firmware is included on the chip set used in the new M10, so disabling it or not including it seems more like a design restriction than a technical one.
We had this same discussion before the M240 was announced and Leica ended up including it. We can only hope Leica has buried it in the menu somewhere.
36MP through a 75 Summilux would be gorgeous!!!