X-bit Labs isn't sure but writes NVIDIA might be considering to create another GX2 graphics card:
Besides creating a chip that would feature over a billion of transistors, Nvidia may chose an option to produce a dual-chip graphics card based on relatively inexpensive graphics processors. Unfortunately, there is no reliable information whether Nvidia’s G92 is actually a complex high-end graphics processor, or a chip of modest complexity to replace Nvidia GeForce 8800 GTS and power a dual-GPU “GX2” graphics card.