Anyone remember math coprocessors?
I do. Al that tech eventually went on the CPU die. As soon as companies can move GPUs onto the CPU die it will happen. And it won't be a 10 year transition. It will happen in about a year. Die hards will sill go discrete a few years longer but the mass market won't get dGPUs.
lol. There won't be some sudden change a year from now. It'll continue to shrink, but there's nothing coming next year that will cause a sudden shake-up. IGPs will still only be good for gaming on low settings in newer games, for example. The exception there will be the "high-end" IGPs on processors which are so expensive that you might as well just buy a cheaper CPU and a card anyway.
The "mass market" that you refer to has already stopped using dGPUs, so it's the "die hards" that are the next target.