I have looked into lab grown meat and have come away very skeptical that we will ever get there. It isn't impossible but there is a LONG way to go. Until we can reproduce an immune system in a vat, it is always going to be to cost prohibitive to do.
That said, the stuff we have today, personally, is already good enough. Yeah I get the whole emotional attachment to meat but it also isn't as sticky a drive as some may think.
1. I know it has its issues, but it seems more realistic than "make everyone vegan".
Disclaimer: Now omnivore, was vegan for 10 years.