Apple announces tvOS.

tvOS 10 - Smarter Siri, Single Sign-On, Dark Mode and more...

Siri

Siri can now search for more specific topics. For example, you can now say "Show me movies about about time travel." Or "Find documentaries about architecture". More importantly, it can now search youtube. Hence you can say "Search Youtube for parrots that sing opera".
Siri can now control your house lights etc. You can say "Turn on my Bedroom lights".

Single Sign-On

Isn't it irritating signing in with a user name and password in each app. Now you don't, all the apps are linked to your Apple ID. Hence you don't have to type the user name and password for each app.

--------------------------------------------------------------------------------------------------------------------------

You can now change your appearance from a dark theme to a light theme. So at night, the screen doesn't strain your eyes.

Updates to Apps

In music, the interface is completely changed, it looks closer to the new iOS 10 interface as well.
In Photos, the memories feature has been included.
There's a lot more in tvOS 10, check it out here.

Rahul