I don't think it's as hard as you'd imagine. Gamers are the craziest of early adopters and tech enthusiasts. They'll flock to you if you give them a great product. Unlike other areas (messaging, social media), you don't need the critical mass to have a successful product especially with cross-play becoming more and more common/acceptable. Even if you need the critical mass, it's much easier to get it with a great product in the gaming industry compared to others.
If Google delivers a great product here, they'll for sure have a huge number of users IMO.
If Google delivers a great product here, they'll for sure have a huge number of users IMO.