Not an Apple TV, but I've had a similar experience with a cheap mini PC velcro'd to the back of my TV. A lot cheaper ($30), less plug'n'play, more software options. Pretty fantastic way to go!
What do you use on the PC? Plex? Something else? I'm curious about this because it sounds appealing but I've found the software to be clunky and unreliable and often neglected by the streaming services.
Same story here, I've got an old laptop and a wireless keyboard / trackpad combo. I haven't touched the TV interface since I set this up.