> However, these are insignificant compared to the number of PCs running x86 today, as well as the volume of notebooks being shipped with an x86 CPU

Which is insignificant compared to the number of smartphones and pad devices running ARM quite powerfully (and without much heat) for hours and hours. Their point?

Everything I've read about x86 is that it is hideously complex, which is almost certainly impeding progress. Why would you want to prolong the life of an architecture like that?