While this can definitely lead to progress in terms of animal welfare, I think it is likely to open up a whole new can of worms as far as food quality for the masses is concerned, after all corporations large enough to be able to invest in industrial scale cell culture are primarily concerned with profit not the relative health of their customers.
Besides, my feeling is to grow a decent burger you need a cow.
I would be interested to see some genuine and honest assessments regarding environmental advantages/disadvantages on such technology.