If they can produce meat in vitro? For vegitarians like myself that don't eat meat because animals have to die, would I eat it? I don't know.
It's an interesting quandery. I don't eat meat because mainly because of the Buddhist belief that if we have had an infinate number of rebirths then every being has once been our mother and that they are still our mothers. Chewing on the flesh of my mother sounds absolutely discusting to me.
So if muscle tissue can be produced in a lab, it's not technically flesh and definately not the flesh of another living being. Is it any less discusting? I doubt it.
I do eat veggie burgers which resemble meat, so I don't know what I would think of eating something that is essentially flesh.