This was mentioned on twitter several weeks ago and reported on in France about a month ago (h/t Sergey Alakov). I missed the memo. Google is now supporting restaurant reservations with the Book with Google Feature in the GMB.
OpenTable was not mentioned at rollout. One wonders what other verticals and booking packages are in the works.
The booking button is a very large call to action on both mobile AND desktop views of a restaurant.
The feature, consistent with the earlier booking services, provides Google OpenTable and restaurant specific insights into its utilization.
A restaurant, comparing Google to their OpenTable data should be able to get a solid sense of where the bulk of their transactions are occurring.Google Adds Restaurants to the Book with Google Feature by Mike Blumenthal