This is clearly a half baked product. ATV4 doesn't even support Apple devices (iPad or iPhone) running IOS 9.1. I've been able to briefly enter my AppleID during setup where you can specify configure with a device. Having my iPad literally sitting on ATV, I was prompted (on the iPad) to activate it. I have then been able to key in my AppleID password. After that, forget it. The device cannot connect anymore to the ATV4. Spoke with Apple support over the phone and after the usual ATV4 restart, iPad restart, ATV4 reset, I've got a "this is strange". Then I hung up and asked for a call back 30 min later, while I was grinding through the tedious task of entering all my password with the stupid remote. On the call back another representative gladly informed me that he found the problem:
ATV4 won't support keyboard over bluetooth (not even my Logitech ultrathin) nor my iPhone 5s or my iPad Air. Support for iPhone and iPad over bluetooth should come at a later date (read in a future fix).
Siri doesn't not work either, in french Canadian. Bravo Apple. I'd say they pushed too hard to get it out the door before Christmas.