Yes, splitting the price seems to make sense, but in today’s marketplace large companies are already cutting every cost possible. The large markets for these cameras were AP, Getty, Newspapers, etc. Those companies aren’t going to want to shell out 6,800 for one camera with the way the industry is going today. Two 1Dx or 3 or 4 Mark IVs. Heck you can get 5 or 6 5d Mark IIs for the price of two 1dXs. AP and Getty already have staff using the 5D’s for a lot of things to cut costs and a lot of their staff is happy to use them. Newspapers have been cutting cost right and left, and if they are buying, they aren’t buying the high end pro bodies anymore. They are picking up 7ds or D700s. Pricing today is a big deal. The gains over the Mark IV might be somewhat steady, but the Mark IV can produce what the companies are satisfied with. Heck, a D5100 produces an image that could compete with a D2x from a few years ago. Image quality is only that important to a few people. 

To those clients, it will be worth it, but the camera won’t have nearly as large a market share as possible with that price point. 

In the future, look for a mirrorless system in your DSLR and even better performance once backside illuminated sensors are released. 

One last thing, look for Nikon to be moving their sensor development to other companies in the future to secure their own technology. Sony is a Japanese company that manufactures imagers for several different camera companies. It is hard to keep the secrets from spilling out to your competition and the Japanese are VERY competitive. A perfect example is Nikon’s new mirrorless camera. That imager was not made by Sony. It came from Idaho.

http://www.youtube.com/watch?v=Al1BI82nV9A