The article is written in a funny way. It's not sharing between AppleTvs necessarily, it's sharing between itunes accounts.
It's super useful at my apartment. 3 roommates with 3 itunes accounts, 1 appletv
Heck, I imagine in most families, each person might have their own itunes account.
An aside, I hope they disallow content providers from using the word "watch" on their icons. It adds a super cheesy tone to the whole thing. Check out the new Disney icons (and ESPN,...