As did Blackberry! And countless other "innovators dilemma" examples.

Intel's a little different though. It's not like consumer sentiment has changed like in the case of the C64->PC or BB->iPhone. AMD and ARM are strong competitors but Intel is in this position because they made a major technical misstep. Maybe more like Microsoft and the Longhorn/Vista debacle. I don't think we can conclusively say Intel or even x86 can't be competitive when they get their process figured out.