Fake meat's best outcome would be for it to be enjoyed as much as meat, but it couldn't replace it. It would just be another thing to experience.
We're used to eating meat and most have been eating it their entire lives. It's unrealistic to think that most would switch in a few years.
Swapping to fake meats, even meat grown in a lab will probably takes decades at the minimum.
Fake meat's best outcome would be for it to be enjoyed as much as meat, but it couldn't replace it. It would just be another thing to experience.