The 1000-nit matte touchscreen will be significantly brighter than any consumer laptop or convertible in the market. In comparison, most Ultrabooks available today top out at just 300 nits or 400 nits for relatively poor outdoor visibility.
https://www.notebookcheck.net/HP-EliteBook-x360-830-G5-display-will-be-two-times-brighter-than-the-MacBook-Pro-13.387976.0.html