From the little I’ve seen of discussions, it depends on the implementation. I haven’t looked at the details yet, but apparently there are some groups who require at least an initial animal biopsy, and I think someone said something about some growth mediums requiring animal exploitation as well.
Then there’s the animal testing side of things.
Since both health and animal rights matter to me, I have no interest in consuming the stuff. If a commercially viable company emerges that can make these meats without any animal exploitation or suffering though, then I might recommend them to others.
I respect this position.
At a certain point I wonder if it will start to seem similar to what I say to anti-choicers (specifically the ones who believe killing an embryo is murder) about drugs developed using embryonic stem cell channels. If years from now they’re still growing off of an initial biopsy taken years before, then the initial harm done is surely outweighed by the harm reduction that came from it. That is to say, a reduction in factory farming and animal slaughter is worth a biopsy. Or even an initial slaughter.
Just like I would encourage my anti-choice family members to get their vaccines and continue to take ibuprofen (and basically every other drug, because most use stem cell lines in their development), I would encourage vegans and vegetarians at the very least not to oppose lab grown meat. But of course you can eat whatever you want.
(Obviously I am not saying you have to agree with me, this is just where I might fall depending on the realities that are eventually reached with lab-grown meat.)