@hittman, if you change Wi-Fi channels you may have to go into the configuration for your smart TV's and manually set the new channel. Or you might be able to refresh / reboot them for those to see the newly selected channel. All depends on how 'smart' your smart TV's are.
Also, your PC's and Mac's might need to be rebooted as well. All depends.
Also, your PC's and Mac's might need to be rebooted as well. All depends.