The AU810PB does not support 8K or 4K at 120 frame per second however, its HDMI inputs support several HDMI 2.1 features which will enhance the audio quality and the gaming experience.
HDMI eARC (AUDIO RETURN CHANNEL)
The AU810PB is one of the first projectors on the market equipped with eARC (Enhanced Audio Return Channel).
If you don't use ARC or eARC, the only other option would be to connect the optical audio output. Like most TVs/FPJs, the optical output is not able to pass the latest immersive surround formats to an external sound system. Ifyou use an optical output, all you are going to provide to your soundbar, or receiver is stereo or Dolby Pro Logic information.
HDMI ARC (Audio Return Channel) supports multi-channel audio, which includes Dolby Atmos. Due to bandwidth limitations, it delivers a compressed audio signal, for example Dolby Digital Plus.
The latest version of HDMI audio return is eARC which can transfer a much higher bandwidth and also supports uncompressed audio surround formats like Dolby TrueHD and DTS Master Audio. This ensures the A/V receiver or soundbar receives the maximum quality audio signal from the projector's internal apps or any directly connected source.
The AU810PS is also one of the first projectors with Auto Low Latency Mode (ALLM). When you play a game on a compatible gaming console or PC, this feature automatically switches into its "Game Mode" for smooth, lag-free game play. Most other projectors require you to do this manually by going through menus and/or settings to change to this mode. You would then have to switch back to the desired video mode if you wanted to watch a movie or broadcasted content.
ALLM doesn't just switch the AU180PB into Game mode every time you turn on your gaming system it is intelligent enough to tell if you are actually using the console to play a game, watch a streaming movie, or play a Blu-ray disc and switches to the most appropriate mode automatically to optimize your experience.