The Nintendo Switch Pro has been namechecked in a Universal Display Corporation earnings call. According to UDI's CEO, Nintendo has chosen a display for its next handheld console, which would be a significant upgrade over the displays found in current models.
https://www.notebookcheck.net/Nintendo-Switch-Pro-referenced-in-OLED-manufacturer-earnings-call-OLED-display-chosen-for-its-higher-contrast-ratio-and-faster-response-times.538935.0.html