The Tech Report picked up a rumor that NVIDIA is planning to introduce its GeForce GTX 960M and GeForce GTX 950M GPUs around mid-March and that a GeForce 940M will also be out in the following months. Exact specifications are unknown but it's speculated that the new arrivals will be based on the same GM107 chip as their predecessors, but with higher GPU and memory frequencies. The reason for this is that the GeForce GTX 960's new GM206 silicon is significantly larger than that of the GM107 (227mm² vs 148mm²).
There's no word yet on specifications for any of those parts. However, LaptopMedia managed to get wind of some performance numbers. Apparently, the 960M and 950M will each be 20% faster than their predecessors, the GeForce GTX 860M and 850M.
Those current-gen parts came out last March. They're powered by the Maxwell-based GM107 silicon, although some variants of the GTX 860M feature the older, Kepler-based GK104, instead.