Privacy and security are a major focus for business laptops. An in-built privacy filter like HP's SureView displays for its EliteBooks is very important for customers who work with sensitive information. To counter HP, Lenovo has introduced its very own in-built privacy filter for its popular ThinkPad T480s.
https://www.notebookcheck.net/ThinkPad-T480s-Lenovo-adds-a-ThinkPad-Privacy-Guard-display-option.326808.0.html