Would you expect these lab-grown meat products to sell well in today's vegan community or do you rather see regular omnivores as the main target audience? I went vegan around four years ago and I don't really miss any of these products and discovered so many great plant-based alternatives that there's no gap to fill.
Furthermore, I'd expect the manufacuring to be very energy intensive and expensive.
A more promising technology for me is the use of yeast to produce specific amino acids and proteins, e.g. to make non-dairy cheese. Using yeast is a well-established process and compared to growing living cells in a lab it's really simple low-tech.