I think most people are excited about Steam on Linux because of gaming, but I've actually been excited because of better driver support. If this makes Nvidia put more effort into their Linux drivers and tools, it will make life a lot better for CUDA programming too. (I haven't tried OpenCL or AMD GPGPU stuff yet.)
So, at least for me, I'm still probably going to get left in the dark if I buy a new chip because support for the Quadros are egregious.