For generations we've put up with sub-10% YOY performance improvements on ultraportables, but with the threat of AMD's competition in the near future, Intel's low-power mobile chips are finally transitioning to quad-cores. Achieved while keeping within the same 15-watt TDP, let me tell you, the boost is huge.
https://www.techspot.com/review/1500-intel-8th-gen-core-quad-core-ultrabooks/