I agree for typical single-user applications, but it's hard to call that the end of x86 as in the article. If ARM were matching x86 cycle-by-cycle in performance for less power that might be a credible claim that servers were next. Also high-end x86 devices run higher clock speeds with more cores so the gap in absolute performance is at least 1000% percent wide. I just don't see ARM displacing Intel when batteries or at least small form factor aren't involved. I don't expect to have an x86-based phone or tablet either.