In the late '90s, when CPUs were seeing the advances of GPUs are now seeing, there wasn't much of a market for two/three-year old CPUs. (According to a graph I had Gemini create, the Pentium had 100 MFLOPS and the Pentium 4 had 3000 MFLOPS.) I bought motherboards that supported upgrading, but never bothered, because what's the point of going from 400 MHz to 450 MHz, when the new ones are 600 or 800 MHz?

I don't think nVidia will have any problem there. If anything, hobbyists being able to use 2025 cards would increase their market by discovering new uses.