TSMC has revealed that its new 7nm FinFet process will deliver mobile chips that are at least 20 percent faster and 40 percent more efficient. It has also revealed that it has developed two separate 7nm FinFet tracks, one optimized for mobile applications, the other for "high performance computing applications."
https://www.notebookcheck.net/TSMC-7nm-FinFet-plans-give-a-big-hint-about-Apple-s-future-iPhone-chips-possibly-MacBooks-too.300546.0.html