AppleTV and "Back to My Mac" (hidden feature?)

Digging around in ATV’s files (specifically in /private/var/stash/Applications/ I see this:

/* Displayed when connected using Back to My Mac */

“138.003” = “You are connected to “%S” over the Internet. Your playback experience will vary depending on the speed of your network connections.”;

What does this mean?  Is there some (undocumented) way to get an AppleTV to connect remotely to our Mac that is elsewhere, via “Back to My Mac?”

That would be cool.  :)