No, it's not going to happen. It will be exactly as it is now with the tracking and reporting except it will be based on 4 weeks per month instead of 2. You will continue to badge in and badge out and they will continue to track your attendance. They will ask you to log days out of office in Workday, that you didn't come into the office for either business reasons (ie travel to offsite etc) or personal reasons (sick, dr. appointment etc). They will continue to report on this looking for patterns and holding you to some unknown criteria. They won't tell you what it is so that you will be as obedient as possible out of fear. They will continue to discipline based on your attendance through bonus impact, PIP or firing you. This is what they do today and I wouldn't expect this to change except it will be based on 4 weeks instead of 2. Maybe the thresholds will change as far as who gets disciplined but you'll never know.
Perhaps some day in the future when the switch to full time RTO is a distant memory and people have been become numb and beaten down to the point where they've given up all hope on remote working and are conditioned to just accept it. Right now though the wounds are still fresh and you still have coffee badger's and angry employees so they have to continue to do this to ensure obedience. Maybe eventually they'll loosen up a little and it will be something like it was pre-covid. I wouldn't be surprised if it takes several years to get there, if ever. Thankfully i'll be long gone by then.