Vivo is currently hyping its upcoming late-2021 flagship smartphones with some tantalizing details ahead of their launch. It seems the latest of these is the inclusion of an E5 display, the latest generation of Samsung OLED displays for mobile devices. It is slated to have a QHD display in at least 1 X70 variant.
https://www.notebookcheck.net/The-Vivo-X70-series-will-launch-with-a-cutting-edge-2K-E5-display.558334.0.html