Ben Schoon, writing for 9to5 Google:

When activated, Privacy Display changes how the pixels in your display emit light, making it harder or near-impossible to view the display at an off-angle. At its default setting, it definitely works, but the contents of the display are visible at less-sharp angles. Samsung has a “maximum” setting that takes this up a notch, and that setting makes it even harder to see the contents and narrows the field-of-view even further. [...]

A bigger deal, though, is that Samsung has built Privacy Display with the ability to only apply to small portions of the Galaxy S26 Ultra’s display. Specifically, it can hide your notification pop-ups. This part really impressed me, as Privacy Display is able to specifically hide only that singular portion of the display, and it does so nearly perfectly. The masking around the notification ensures the content behind isn’t affected, and the effect works incredibly well.

Neat feature, especially the way you can toggle it when needed, set it to auto-enable for specific apps, and/or work only for notifications.