Here is a question, have we reached a point where what we have is good enough for 95% of the market? If so, there is little incentive for general public to buy the new shiny thing even the relative performance is high. Majority of general purpose software is not limited my modern hardware, and many use cloud based software. It would take few years for software to catch up to the current hardware. What I am trying to say is, Intel (and AMD) have to find different market/target for new CPUs. Otherwise they won't able cover the R&D and manufacturing cost.
Having said that, personally I want more than 16 cores(p-cores) in desktop .