Roku TVs can detect what you’re watching on cable to see if it’s available on Netflix 

The new feature, coming to Roku TVs as part of a the latest operating system update, is called “More Ways to Watch” and is designed to show you whenever a show or movie you’ve got on can also be streamed using popular services like Netflix, Hulu, and Amazon Video.

Source: Roku TVs can now detect what you’re watching on cable to see if it’s available on Netflix – The Verge