Apple Magic Keyboard
The built-in trackpad on the Apple TV remote and Siri functionality should make typing and searching for specific content much easier than on older Apple TV models, but that's not the case. If you want to connect a keyboard to your Apple TV, look no further than the Magic Keyboard.
Bluetooth keyboard support is arriving for the Apple TV in an upcoming update, so while it doesn't have it now, it's coming very shortly. In the mean time, you can prepare yourself and buy one now.
The Magic Keyboard can connect to your Apple TV through Bluetooth, and its compact size makes it perfect for the living room or even the bedroom. We tried the keyboard out ourselves and found it to be rather decent, but its price is certainly on the high side.