That was obvious once they gave up trying to make CPUs run faster and started cramming more and more cores into computers. I remember when each year the latest CPU's speed was far faster than the previous year's model. Over the last few years I haven't noticed any dramatically faster CPUs on the market.
My laptop's seven or so years old and I can't detect much or any improvement in the stuff on the market now unless you're spending big bucks. I guess the development'll go into size and efficiency now.
It's similar to technology overall. In the 1960s we were looking forward to going on holiday around Jupiter. Instead we get phones that can record the decibel levels of our farts while we sleep.