Google Lens in Photos can detect objects and places in your photos and give you more information. It can also detect phone numbers and addresses and give you contextual actions like Call or Navigate.
The new feature was first reported by Reddit user LaceratedCantaloupe from Google Photos v3.7.171902479 and since he hadn't received a Play store update the feature likely came through a server rollout. A few other users have reported the Google Lens feature in the Photos app on their Google Pixel first generation.
Photo courtesy of Reddit user LaceratedCantaloupe
Images courtesy of Reddit user Phinocio
i don't like the fact that any feature is Pixel 2 exclusive, it should be simultaneously available at Pixel 1 also...
google does it again. Thanks Bixby !