It makes the assumption - always wrong - that people don't want more cpu. People ALWAYS want more cpu.
Your assertion is dissociated from reality. It completely ignores the netbook phenomenon, not to mention the inception of smartphones and tablet computers.
People don't buy these devices because they "want more CPU". After a certain level, the "CPU" amount is irrelevant and its practical effects are completely unnoticeable. There is a good reason why hardware companies rely on artificial benchmarks designed to push the hardware in completely unrealistic, useless and impractical scenarios to be able to compare their hardware against the competitor's offering, and therefore justify a higher asking price.
To drive the point home, I can tell you my personal case. My last two hardware purchases were a netbook and a smartphone, which, by today's standards, are considerably lacking o the "CPU" department. Yet, they are by far the two pieces of hardware which I use the most. I also have a desktop and a laptop which I've purchased a few years ago, and I actually use them for serious stuff which actually require real CPUs to crunch real numbers. I'm talking about structural analysis and CAD work. In spite of actually having to use a computer to actually do some serious number crunching to actually get a meaningful result, unlike calculating pi to the nth digit after the decimal point, the fact is that both my archaic desktop and laptop are more than capable of handling heavy workloads required for practical engineering work.
And this without even relying on OpenCL to take advantage of the hardware which is already present in the system and basically never leaves the idle state.
So, in short, contraty to what you said, people actually "don't want more cpu". People actaully know that they can't notice it after a certain point, which was actually passed about half a dozen years ago, and people are also aware that the inflated price tag associated with having "more cpu" actually doesn't justify the diminishing returns they get with that purchase. What they want is cheaper stuff that is actually good enough to get the job done, and if the job in mind is checking email, facebook and any other mundane tasks then people do know that the price tag of a supercomputer is completely unjustified, when they can easily get away with it by purchasing a glorified cellphone, with or without an embedded keyboard.