Switching Accounts

Anyone know what it's like switching iTunes accounts on the new ATV?

I currently have 2 Apple TV 3's, one on a local NZ iTunes account and another on a US account.
This since I kept having to change the account and the region with just 1 ATV, and I got the 2nd ATV3 for a good price.

 

I can answer my own question now that I have received the ATV4.
Each account is individual, i.e. you can have multiple iTunes accounts with different countries ( it will auto switch when you select which account to use) , the home sharing account is also seperate and so is iCloud. This is awesome.

 

Yes Siri works fine, just need to be logged into the US iTunes account.

 

There is an account switching system that remembers the login details, password and country of the iTunes account.
You just have to select the account and click ok, to switch to it.
All apps exist side by side regardless of iTunes account origin, and they also launch without requiring you to login to the respective iTunes account.