I've actually wanted to try an impossible burger for a while, but on every occasion that I've eaten where they are served I noticed they weren't any cheaper and I'd rather just enjoy a real burger.
If they cost almost as much as meat then I'll eat real meat.
If they don't taste great then I'll either eat real meat, or real vegetables that aren't heavily processed like the fake meat.
If they are significantly cheaper and taste good then I could see myself replacing some of the non-meat stuff I'd otherwise eat with fake meat.
In my current hierarchy of preference it falls near or slightly below "formed, fried, chicken scrap nuggets", so it would take significant price incentive to overcome that deficit. I'm willing to be swayed, but they're going to have to move me.