Apple TV app for the new Tablo TV
When will a new app be released for Apple TV to work with the new Tablo TV (4th generation)?
Tablo TV (the device) seems to be geared towards live TV, not online VOD streaming services.
As this is a user-to-user community, no one here can tell you if or when Apple will support more third party devices.
You can of course give feedback to Apple about your wishes. Feedback - Apple TV App - Apple.
If you mean the reverse (Tablo app for Apple TV box), then all we know is the announcement “coming soon”.