The whole pc industry (with the exception of SSD manufacuturers) have innovation gain problems,
not only Intel where Moores law is abandoned and their tick-tock has been replaced with a tick-tock-yawn cycle,
Look at it:
DDR3 vs DDR4 RAM only a few % gain, no big deal, no need to upgrade at all, only lower power.
HDD: prices ($/GB) have been fixed for a long time already and progress is slow, last two years they have grown from 6TB drives to 8TB, if they would have had the same growth as in the 90s there would have been 36TB drives by now for $100 max.
Things are slowing down and the developments are targeted at lower power same performance instead of more performance. Perhaps when multi processor software development breaks through we can see some next steps (multiple processors on a motherboard), but for now it is pretty static.