The under-display sensor may come to replace the punch-hole in smartphones as time goes on. A new report by a Korean media outlet asserts that Samsung has them in the works for 2021; however, they will only feature in the OEM's highest-end foldable device. Meanwhile, the same company is now said to also have affordable versions of the Galaxy Z Flip in development.
https://www.notebookcheck.net/Samsung-under-display-cameras-will-be-exclusive-to-the-Galaxy-Z-Fold3-in-2021.505228.0.html