Ground meat is almost certainly the lowest bar for substituting. I'd argue the artificial meat is already pretty close (although probably at a higher cost, at least at the low end). There are probably gourmet burgers that are still better--though high-end meat cuts are at least somewhat of a waste in a burger.

Somewhat amusingly, I first had an Impossible Burger not knowing that it was not real "meat." I didn't find out until a few months later. It tasted like a perfectly good burger to me.

[ADDED: Lab-grown is apparently more accurately used to specifically refer to food made from animal cells. I guess "plant-based" meat is the more common term with "meat" distinguishing from traditional vegi-burgers in the grocery freezer.]