One slightly "larger" mirrorless entry does not make a trend yet. And compared to 7d ii the nx1 is still smallish.
I understand that many regulars here often use long/large tele lenses eg for birding, wildlife - and therefore don't mind or prefer larger camera bodies.
I prefer cameras as small as possible for a given sensor size and control set/UI. I want to use only 1 universal camera. so that i am totally used to one user interface and can operate it "blindfolded".
When i go mountaineering or biking, i put a pancake lens on it and carry it in a small case on the left shoulder strap of my backpack - ready for immediate access.
When i go for a street photography walk, i want to carry small camera plus small pancake in my hand (eos m + 22).
When i am on a touristy, non-photo city trip i take it along in a small shoulder bag with pancake, kit zoom and wide zoom lens (eos m + 22 + 11-22 + 18-55),
when i occasionally shoot a wedding or more often a concert i want to put a battery grip on for more ergonomical portrait shots and for more battery power and to provide better balance with larger f/2.8 zooms (eos m fails here),
and when i ocassionally go to the zoo or to a national park i also put the grip on and the 100-400 II plus 1.4x converter ... Plus tripod.
And if i were into video as well, i'd put the thing into some rig and set it on top of that tripod or on a slider or dolly or whatever. With or without vertical grip - depending on nature and duration of shoot.
All with one SMALL and LIGHT camera.
You can always and easily make a small camera bigger and heavier. But you cannot make a large, heavy camera smaller and lighter.
GraFax said:
The trend in high end mirrorless cameras is that they are getting larger not smaller. The NX1, which I've used, isn't any smaller or lighter than a DSLR. I'd expect the A9 when it arrives to be similar. Although the small chassis MLC's generate a lot of "gee how'd they do that" buzz, the "lens with a camera attached" ergo's are off-putting for a lot of serious shooters. You may not agree, but that's what many think.
edit .. Interestingly, the only bundle that's available for the NX1 includes a battery grip. Doesn't sound to me like smaller and lighter is what they are going for.