Whiskey Lake-U doesn't offer much in terms of performance enhancements over its immediate Kaby Lake-R predecessor based on our initial benchmarks with the Asus Zenbook UX433. It's largely forgettable if you already own a Kaby Lake-R laptop, but users with older systems will still see value if deciding to upgrade.
https://www.notebookcheck.net/Our-first-Core-i7-8565U-Whiskey-Lake-U-benchmarks-are-in-and-performance-is-almost-indistinguishable-from-the-Core-i7-8550U.366651.0.html