Finally, has it not dawned on anyone that no matter how small and cute the body may be, once you put a longer lens on, it becomes bigger and cumbersome?
Those sold on the concept of the smaller, lighter mirrorless systems might think of it a bit differently. Here's the way I explain it, being a DSLR shooter who also owns a mirrorless interchangeable lens camera:
The DSLR is the big SUV...it can handle almost any duty - go offroad, haul the whole family, load up a bunch of stuff...the only thing it can't do is be compact and sporty. I love it, I need it, but I have to forego that one area.
Now a compact or P&S camera can be like a small sports car - light, agile, fun, easy to park...but it falls short on so many other measurements against the SUV.
The way I see a mirrorless camera is that it is more like a sports car - maybe a slightly larger one - lets call it a touring car. Not QUITE as small and agile as the P&S, but the larger size allows it to have a lot more power and speed...while still being far smaller, lighter, and more agile than the big SUV. Then you bring up long lenses - they make it no longer small and agile. I consider using a long lens on a mirrorless like adding a hitch and hauling a small trailer behind a touring car. It will temporarily lose it's small, sporty, and agile abilities, but adds much more room and storage and versatility - I can nearly match the SUV's utility in many respects - though still can't go off-road with it. Yet when I no longer need it, I can take off the trailer and have a small and agile sports car again. With the SUV, it can't ever be smaller and more agile, no matter which lens you put on it.
My NEX system is very very small. The lenses are not as small. There is a pancake option for when I need it to be pocketable, but accept the limitations that lens presents. There's a standard kit, which makes it unpocketable, but overall weight and volume are still a fraction of my DSLR. And if I need it, I can stick a longer lens on it to get certain shots - accepting that it is temporarily now much closer in size to a DSLR, but only as long as that lens stays aboard.
But I still need my DSLR. It handles better with the bigger lenses. It's ergonomically better for frequent shooting. It's faster to focus and tracks better. It has more lenses available to it. The battery lasts longer. It can fire bursts faster and has a bigger buffer.
Having BOTH in my garage is the perfect combo - the SUV and the sporty touring car...plus a little trailer kept along the side of the garage for those times I need the touring car to fill in for the SUV.
My problem with the Nikon as I can see so far, is it's a bit too small of a sports car - it's like a tiny subcompact with the roof cut off and sporty wheels - it looks about the same as the touring car in size, but open the hood and you have a tiny little 3-cylinder engine puttering inside.
Sony DSLR-A580 / Sony 18-250mm / Minolta 50mm F1.7 / Sigma 30mm F1.4 / Tamron 10-24mm / Tamron 150-600mm / Tamron 90mm F2.8 macro / Minolta 300mm F4 APO
Sony A6000 / 18-55mm F3.5-5.6 / 55-210mm F4-6.3 / 10-18mm F4 / 35mm F1.8 / 16mm F2.8 / via manual adapter, lots of Pentax K mount, Konica K/AR mount, and Leica M mount manual lenses