This is a simple "we did it because we can" card, it's simply too much money.
You can buy a whole system that has just as much gpu power, if not more, for less money. Just buy two 780Ti cards, a 4770k, an SSD and even some watercooling parts.
I was talking to Tom earlier saying that the heavily hinted upcoming AMD dual GPU would have a hard time competing, given how the 780Ti compares to the R9 290X and the fact Nvidia claims it is cool and quiet, then I realized that AMD's card will not be anywhere near as expensive (if they have any sense).
Even if the AMD R9 295X is hot or loud, you will likely be able to water cool it for far less than a GTX Titan Z.