Belkin's latest screen protector for Apple ultrabooks also confers a property that HP devices with SureView have by default. It occludes the content on these screens for viewing angles not those of the user, thus reducing the risk of intrusion or some immediate forms of data-theft. It is available for 13-, 15- and 16-inch MacBooks Air and Pro.
https://www.notebookcheck.net/Belkin-s-new-Screenforce-series-product-for-MacBooks-is-also-designed-to-boost-privacy-while-using-these-devices.481228.0.html