I use Sunshine streaming from my home office gaming PC (4070Ti Super) via 1Gbps Ethernet to a "Google Chromecast with Google TV" streaming dongle running the Moonlight client in our dedicated home theater room. The streaming dongle is powered via a USB-C hub that has an Ethernet port and the HDMI output is plugged into a Denon AVR as an input source.
The AVR outputs to a ceiling mounted laser projector with 150" screen. We run games at 4K HDR10 / 60 fps with no latency I can detect. The key is avoiding wifi and testing actual point to point throughput (I run a local instance of OpenSpeedTest). The streaming stick gets around 320 Mbps which is more than fast enough (it's capped by the Android TV CPU and poorly optimized driver stack).
The AVR outputs to a ceiling mounted laser projector with 150" screen. We run games at 4K HDR10 / 60 fps with no latency I can detect. The key is avoiding wifi and testing actual point to point throughput (I run a local instance of OpenSpeedTest). The streaming stick gets around 320 Mbps which is more than fast enough (it's capped by the Android TV CPU and poorly optimized driver stack).