Nikon D7100 will kill Panasonic GH3

It's about planning long term investments into some camera system. About choosing right system based on priorities. IMO, if compactness is priority then m4/3 is the right choice, just GH3 doesn't belong to compact camera camp. If everything else is a priority - APS-C will eventually beat smaller format.

Obviously, next generation of cameras are expected to beat the previous generation, there is no question about it. But there are things you can expect about system formats progress in future.

2 Shirozina - no, I don't expect GH3 owners to move into APS-C because they already chose their system. I expect them to stick with GH3. But, I think it's good to know where camera systems stand.