Well this is a nice surprise! In Canada, Bell Fibe TV now has an AppleTV app. It appears that you have to subscribe to Bell Fibe TV and have their whole-home PVR installed, but you can expand the service to additional TV's in your home by using the app on an AppleTV 4.
http://www.bell.ca/Fibe-TV/AppleTV#INT=FTV_tvfibehmpg_BTN_ALM_Mass_102416_wc_connect
http://www.bell.ca/Fibe-TV/AppleTV#INT=FTV_tvfibehmpg_BTN_ALM_Mass_102416_wc_connect