Ask HN: For how much longer will CPU core counts keep doubling?

What are the fundamental constraints here? How many cores might we expect in a consumer CPU by the end of the decade? What about a server CPU?

Developers have come to rely on all the instruction pipelining intelligence, but perhaps a few fast cores could keep that and the rest would become more simple so that core count can increase?

Or will GPUs make CPU core counts above a certain point not relevant?

I have a poor understanding of this area, so please excuse any naivety in the question!