NVIDIA is working on new Quadro M5000 and M4000 graphics cards and may launch these two cards at SIGGRAPH 2015 in August.
The two cards have been leaked thanks to the latest NVIDIA driver that adds support for these two new graphics cards. Both these cards are expected to use the GM204GL GPU, based on the latest Maxwell architecture. No other details on the cards are available as of now.
Apart from the Quadro M5000 and the M4000, NVIDIA is also working on the Tesla M60 graphics card that will be based on the GM204 GPU. This too is going to be a professional graphics card like the other two.
The SIGGRAPH 2015 event kicks off on August 9th, so we may expect the cards to show up on that day.