Upload & Sell: Off
Honestly? From the current rumors it sounds like people should just buy a D600 and get free shutter maintenance!
For a D610 to interest me, as a landscape photographer, one thing it really needs to offer is 1-click 100% zoom during image playback. After having this feature since, what, the D200? ...I found it infuriating to live without when I reviewed the D600. I couldn't wait to get back to my other Nikons.
And when the D7100 was released without an AA filter and WITH the 1-click 100% zoom image playback, to me that was the nail in the D600's coffin for landscape / adventure photography. Why waste precious money and add precious ounces when I can have almost the same thing in a DX sensor? If you ask me the D7100 is the ultimate adventure camera now, and as the current rumors are putting it the D610 will not take back that crown.
Admittedly, both cameras could use GPS, a flippy LCD, and better FPS. And clearly Nikon has no intention of giving us those first two in an advanced DSLR any time soon. Which is why I gave up hope for Nikon's next 2-3 years and just bought a D5200 to tide me over. (I shoot weddings as my day job, for which my other 12-megapixel Nikons are great, but the landscape shooter in me has grown jealous of the DR and resolution that newer sensors have begun to offer...)
Hey, maybe the D5300 will have GPS....but then again crying over a camera that replaces yours just a few months after your purchase is like, well, spilled milk... ;-)