I'd bet you a lot of money that most people can't make out an Impossible burger vs. a beef burger in a blind taste. Tasting has to do a lot with psychology (see Pepsi vs. Coke blind tastes), and that's why people think plant-based meat sucks (there's a big variance in quality, agreed). Lab-grown meat won't change this fact.

We're at the point of disagreeing over opinion, but I'm pretty confident you'd lose that bet :) I say this as someone who usually orders the Impossible option. It is the first plant-based meat I've had that actually crosses the threshold into "good enough," but it's still noticeably inferior to a good beef burger. Most plant-based meats genuinely do suck, I prefer just forgoing those and doing a mostly-vegetarian diet, personally.

I think lab-grown meat has a much better chance than plant-based meats of satisfying the "want" of meat, while drastically lowering the environmental effects of eating meat. And again, I think pursuing both options is the best choice. I eat less meat thanks to Impossible, and I hope they continue to succeed.