What it boils down to is a DSLR is big, heavy and conspicuous and this puts it at a distinct disadvantage for street and travel photography. M9 fills that niche admirably, albeit with quite a few compromises - manual focus being one of them.
Outside of those uses, I personally cannot see much point to getting the M9. I'm sure that if Canon built a reasonably-priced EVIL, that would take a lot of wind out of the M9's expensive sails. I would get one just for street/travel photography, and use my DSLR for everything else.
The other benefit of the M9 is the corner-to-corner sharpness of the wide-angles on offer. Again this is something that Canon can and probably will address at some stage, although it can be mitigated somewhat by stopping down to f/8, if shallow DoF and fast shutter are less of a concern. Perhaps the patented 14-24mm will rectify this issue.
Enjoy the M9, and hope its resale value holds after Canon release a high-quality EVIL that blows the M9 away