Discrete graphics is going away, they seem to be leaning increasingly towards the HPC market but that is tiny compared to the consumer graphics market that their company was built on. I just don't see it. Anyone?
Discrete GPU market is growing. See JPR's analyst reports http://jonpeddie.com/press-releases/details/embedded-graphics-processors-killing-off-igps-no-threat-to-discrete-gpus/
here is the full report http://jonpeddie.com/download/media/slides/An_Analysis_of_the_GPU_Market.pdf
There are tons of other CUDA accelerated numerical packages besides Matlab -- Mathematica, LabView, plugins / wrappers / libraries for Python, R, IDL. Some of these are linked from NVIDIA's website
5 of Top 10 most green supercomputers use GPUs:
Green 500 List
Each GPU is very high performance and so high power. Performance / watt is what counts and
here GPUs beat CPUs by 4 to 5 times. This is why so many of the new supercomputers are using
GPUs / heterogenous computing.
Nature always sides with the hidden flaw.