In a quite entertaining article, Mike J of The Online Photographer finds his Camera of the Year. It coincides with my own favorite camera, the all-round
scrumptious Olympus OM-D E-M1.
Compact, but tough, fast, sharp, top ergonomics, great anti-shake, excellent selection of lenses...
... Now if only the on-off button was not on the left side of the camera so you can't turn in on one-handedly... Grrrr. (Actually this does not bother me much, but heck, nothing is perfect in this world, there's gotta be something to grumble about.)
(And Michael Reichman of The Luminous Landscape is on the same page.)
Yes, you can get sharper images (in big prints) and go into lower light with a full frame camera like the excellent Nikon D800, but you have to weigh this (literally) against the significantly added weight of those cameras and lenses. And their bigger sizes, and the bigger prices. All of those tend to be about 2x or more, so far from insignificant.
Me, I think that Micro Four Thirds is the new 35mm, and Full Frame is the new Medium Format.