If you use HDMI-CEC on the Xbox Series X / S console, you can immediately control the input signal of the TV via the controller.
So you can change faster between the TV station, the console and other input sources.
In addition, you save the tedious search for the eternally disappeared remote control.
If you have activated the option and, for example, to enable another input signal as the Xbox, you only have to press the Xbox button on your controller and the TV input is switched to your Xbox console.
For example, you can quickly switch your TV back to console video without using your TV remote control.