But every one of the D4 features has been mentioned as a must-have by someone or another on this and other forums, a camera as you describe would still have a of of people screaming. Your list is pretty modest compared to many predicated. The subsystems needed to support the demanded hi-iso performance, AF performance, resolution and high frame rate can't be done now if all combined as a requirement by anything other than the D4. Any one of those items taken alone could be done for a modest price but all of them combined presents difficulties in delivering them simultaneously because they are opposing characteristics. Higher res required the D800 to be slower and even with a gigantic buffer, it is shallower in number of frames, just as an example of each item having negative impact on the other items. Yes, you can get a car that is optimized for fast cornering and others which can carry a lot heavy loads but not both in the same vehicle. People are demanding the 2 ton load capacity Enzo Ferrari for the price of a pickup truck.