Nvidia might be bringing a workstation class card based on the GK110 GPU in the near future.
Nvidia is reportedly expanding its range of professional workstation cards with a new SKU based on the GK110, the same architecture used in the Tesla K20, K20X and the GeForce GTX Titan. The new card will presumably be called the Quadro K6000 and will include 208 TMUs, 40 ROPs and carry 5 GB of GDDR5 over a 320-bit memory interface.
It is likely that the card will have 13 of the GK110's 15 SMXs enabled, by comparison the GTX Titan has 14 SMXs enabled and there are no reported cards with all 15 enabled. Consequently the Quadro K6000 can be expected to have a CUDA core count that goes up to 2496.
The Quadro K6000 is expected to release in the near future with an expected sticker price of between $2500 and $4000 and may turn out to be an worthy upgrade to the Fermi based Quadro 6000 as it should offer roughly twice the performance.