You reminded me of the flipper zero video game module[0] with it's "video out port" which "transmits a video signal in DVI-D format to an external TV, monitor, or projector".

They are not quite the size of Valve though, and can expect people to figure out what that that port is.

0: https://docs.flipper.net/zero/video-game-module

They just used the well-known PicoDVI implementation that exists for the Raspberry Pi Pico:

> https://picockpit.com/raspberry-pi/raspberry-pi-pico-video-o... (scroll down to "DVI")

> https://github.com/Wren6991/PicoDVI