Upload & Sell: Off
If I had the funding to invest in a high end system, than I might make the switch.
My interest is mostly in wildlife photography, but I also like to shoot other things (landscapes, portraits of son, street shots etc.). It seems like this camera could pull off all of those things nicely. 36MP files for excellent landscape and portrait detail, a DX mode with 15.6 MP (excellent idea btw) for wildlife as well. With the grip I could also pull off 6 FPS in DX mode which would be useable for wildlife. Seems like a very well rounded camera for almost anyone really.
One thing that would really make this camera nice, would be an mRaw and sRaw option like Canon uses. This would allow users to have smaller files when you didn't need 36MP and would save some PP time. Fairly easy to do in post though, so it's not a big deal. I really wish that canon would steal the DX crop mode idea from Nikon!
Sadly, I don't have the money to make a FF system worth it for me right now. I'll keep on using the 7D and 100-400 combo for a while and keep an eye on things. This camera definitely did get my attention and I would love a 200-400 VR. I know that canon will be releasing their version soon, but with current pricing trends I'm expecting a ridiculous price...