One would also have to consider the media in which it is grown- does it have animal products added like bovine calf serum, common sources of growth factors for maintaining cells in culture, which are unlikely to be produced from a shechted animal, even if it is kosher (there is also horse serum). And if they use plant products instead of animal products as growth media, then there may be issues of chametz to consider.
AviK I think your ever min hachai question is fascinating. Say they take a muscle fiber biopsy from a live cow, isolate the stem cells or muscle progenitors from the tissue, and then grow it/differentiate into a steak, is eating the steak considered eating ever min hachai?