After listening to all this, I have an atypical interpretation (or as "Serpent of Darkness covers in point #5) . Nvidia enjoys (nye almost demands) such PR to keep selling GK110's as a gaming offerings, hear me out.
Nvidia knows the tipping point they can recoup engineering, tooling, manufacturing costs to deliver such a card, and they have a good idea the number they can expect to sell. Even if that number of units mainly to enterprise purchasers, the PR frenzy it whips-up within "Gamers" just adds to the business plan for releasing it. It's a perfectly good plan, and it returns venue, actually better profit that selling "X" amount chips individually (at lower margins) as offerings that counteracts AMD Hawaii product. Nvidia gets to elevate the brand even higher, use up chips on extreme products offerings, and that actual adds "cred" to themselves as not directly vying with AMD.
We know 20Nm Maxwell is some time off, Nvidia needs to maintain GK110 production, but can’t hold margins selling a bunch in some price war especially the good full-compute parts. I think the dual chip board Nvidia realized it lends itself to more to low-end enterprise, as the package provide substantial punch in more non-traditional chassis arrangements. Two of them puts 4x compute without the need for risers on a more traditional (cost effective) motherboard, but honestly I don’t how/what is entailed in that today. So, they release this as it devours two full-chips, pays the overhead, return profit, all the while shoring up the legitimacy for the pricing on the GTX 780/780Ti. Best of keeps the gamers in side-bar discussing it. It’s a very shrewd move to extent they use 2x the product (GK110), in an exceptionally high margin offering.
It will find buyers mostly from enterprise/compute that hadn't justified the Tesla/Quarto pricing. I see it as product that 85% of even "bleeding edge gamers" won’t step-up to purchase… that fine. It's a card that folks can use as for experimentation, pushing huge resolutions and multiple monitor configurations, if some deep pocket gamer finds it worthwhile... all the more merry.