Why would Google want to do this? Current 2FA suits its role perfectly: it prevents a large scale leak, one that would result in bad PR. There is no incentive for Google to care for individual users.
The government is slowly figuring out digital ID and will show up to regulate it.
Identity is too critical a business for services companies like Google to walk away from. It’s stupid, because once the camel gets it’s nose in the tent, it will cost them more.