They must have worked on Smart TVs because they're practically unusable. No clear feedback on where the cursor is? Check. Banners that are also buttons? Check. Going to the global Settings menu to log out of an app instead of doing it from the app? Check. Reacting to a remote control press several seconds later? Check. The power button not actually turning off the TV but putting it in a sleep mode so that later it wakes up with even worse performance and other issues? Check.