Thank you for posting to the forums! I understand you are looking for a way to watch the Slingbox on a remote TV, and I would be happy to provide some information on that! Since you already have an apple TV that would be the device to use to view the Slingbox. We will also need the iPad with the SlingPlayer app.
Here is an article that will walk you through viewing the SlingPlayer on the Apple TV:
Hope this helps!
The Sling Moderation Team - Leanne