They do call this out towards the end.
Traveling without the Apple TV and the exit-node can be your Apple TV.
> With a Tailscale exit node, you’re in control and you get the internet connection you’re used to. This new feature could come in handy if you’re traveling with your Apple TV and want to access the same geo-restricted channels you can see from home.
I can now, move Tailscale off that server, and put it on my Apple TV to use as my network for my DNS server when I am away from the house.
It's also a way to proxy your connections through a device at home, of course. Whether the Apple TV is the client or the exit node.
Tailscale isn't particularly useful for acquiring the pirated media in the first place, of course.