I'm truly confused as to the market for the mirror less cameras that fall between the G1X series and an SLR.
1. With any lens, it is not pocketable.
I have a panasonic GF series (similar size to the new Canon). With a pancake prime, it is jacket pocketable (it will fit in a pants pocket but it makes quite a bulge)
"Pocketable" is not the one true gold standard for compactness. Female camera buyers typically carry handbags, and the small mirrorless cameras will fit into a handbag quite easily. A DSLR with a standard zoom doesn't work nearly as well.
The physical size of a usable kit is much smaller. For example, my gf2 + 20mm pancake + 45mm will fit in my wife's purse. The 5DII + Sigma 85mm + 35L will not.
2. Requires company to make an entirely new set of lenses on a new mount.
That's inconvenient for the manufacturer perhaps, but it doesn't in itself make the camera less desirable for the buyer (the implied wait before the lens lineup matures might be however)
What kind of customer is best suited for this niche?
DSLR users who want a less imposing companion to their big full frame but aren't willing to settle for point and shoot.
Users who want a good quality camera but want it to be smaller than a DSLR. It might take a sophisticated user to appreciate all the features offered by a 1DX or even a Rebel. It doesn't take a very sophisticated user to get annoyed with the time it takes for the AF system to lock on, the blurry images that result from slow shutter speed (due to the slow lens and ISO limitations of a small sensor camera), or red eye, ugly lighting and slow recharge from a P&S flash. This camera seems to be aimed at such users.
In the case of some of the high end mirrorless, some enthusiasts enjoy the ability to adapt lenses.
