Yes, having an external box can be a good idea, but some things you may want to have in the TV itself such as the picture adjustment settings. There might also

Yes, having an external box can be a good idea, but some things you may want to have in the TV itself such as the picture adjustment settings. There might also be multiple inputs, and IMIDI interface which can be used to select between them and switch TV on/off and adjust volume and so on, allowing you to program other devices to control it.