9to5Google spotted during an APK teardown that Google TV may soon automatically connect to previously connected apps and services to make it easier to get started with a new smart TV or dongle. Today, you can sign in to your various streaming services and music app in the Google Assistant settings, which streams them to other Google-connected devices like the Nest Hub or any other Cast-enabled device. .
Unfortunately, that convenience ends when you buy a new Google TV dongle. The service provided by Google TV, which offers recommendations based on what you subscribe to, will work once you log into the dongle with your account, but if you want to browse the full library of content for your streaming apps, you’ll need to log into each one. This can be a very tedious and time-consuming process.
There is hope, however, as the latest Google TV Setup app update (version 1.0.4508) mentions that it will use your list of connected subscriptions, automatically download their apps and, if possible, log you into your accounts. Here is the exact wording:
Several apps are included with your TV and will be installed during setup: %1$s. In addition, applications for your subscriptions will also be installed.
App information from devices associated with your Google Account will be used to set up and sign in to these apps on your TV.
Source: 9to5Google
As you can deduce from the wording above, it looks like google tv is not using google assistant credentials to sign in. Instead, it will copy data from another device, like your phone, tablet, or TV. It will be a great help for those who are subscribed to many streaming services and don’t want to spend unnecessary time logging into each app.