Termius for AppleTV 4
Termius app for AppleTV 4 would be great. Have the SSH Windows om the TV and use AppleTV remote control(app or physical) or external keyboard for text input. Maybe support for tabbed Shell Windows.
This would be both a violation of App Store policy and impossible unless you manage to interface with the underlying TTY of tvOS. AFAIK there's no tvOS 10 jailbreak as of today, so unless you're creating one or have found some other way into the OS, this will not happen.