It is also why Apple dropped ppc. and now Arm might do the same to x86. (I hope for my jobs sake it doesn't)
Both PPC and ARM have outsold x86 CPU's for many years (as does MIPS, and possibly even 6502 derivatives if the numbers on WDC's website are to be believed). ARM's are expected to ship in more than 3 billion units this year....
x86 gets all the attention because Intel's and AMD's CPU's are big hulking high cost beasts...
It will keep getting attacked on all fronts, not least because ARM's are rapidly getting to the "fast enough" level where most ordinary consumers don't care about performance any more. And then competing with ~40 GBP ARM computers slightly larger than a credit card becomes an unpleasant proposition (my "media centre" is one of those powered via micro-usb, and streaming files from my file server.
