I'm definitely worried that no one knows what weird diseases this could cause years from now, and if any research pointing to cancer or other problems has been kept secret (like it's been done before in so many cases).
For sure, intensive farming is bad for everybody (besides the farmers, perhaps), and anything that will reduce it is good news IMHO.
As for how I'd feel eating lab meat, we only eat meat because most of us haven't seen how animals are kept, what they're fed, and how they're slaughtered (I have at my dad's organic pig farm and it's nothing pretty--and I can't imagine how intensive production looks). So, I guess meat coming from a lab is just as gross/weird as the above, I would probably try it and even get used to it.
I'm sure vegetarians will love it--or at least the ones that do it for the animals--as they'll finally be able to eat meat, which is unarguably personal preference but IMHO about 100 times better-tasting than imitation meat (like those burgers you buy at the grocery store).
I suspect if it's cheaper I'll get it served at some fast food restaurant, so I'll have a chance to try it.