Intel's presentation at Computex revealed a 15W 8th generation (presumably mobile) CPU with 4 cores and 8 threads. The unnamed chip was shown outperforming a Kaby Lake i7-7500U CPU by 30% in SYSmark 2014.
https://www.notebookcheck.net/Intel-s-8th-gen-Coffee-Lake-15W-chips-to-be-up-to-30-faster.224716.0.html