When shopping for a new TV for your PS5 or Xbox Series X, the term "HDMI 2.1" will come up several times. While most people tend to prioritize other factors like getting a bigger TV or an OLED panel, HDMI 2.1 is more important than you think. If you want the best gaming experience from your new gaming console, you'll need a TV or monitor with HDMI 2.1 ports.