To get Steam Deck hooked up with a gaming projector, you’ll need a USB-C dock/hub with HDMI. Valve plans to sell an official hub, but any USB-C dock will do just fine as long as it’s adequately powered. In other words, any dock that works with Steam Deck competitor Nintendo Switch is good to go. Once you have the dock, just connect it using HDMI to your gaming projector. And since Steam Deck is compact and portable, you can place it right next to the projector, negating the need for long and messy HDMI cables. As for controllers, Steam Deck supports Bluetooth connections to those so you can sit quite far away from the portable PC in your comfy seat of choice.