This "artificial meat" sounds like an interesting experiment, but I doubt that it would gain much of a market...even IF they could get the price down to $10 for a hamburger pattie....which would still be far higher than the price for beef. It's true that with this planets ballooning populations, traditional agriculture is increasingly being stressed to supply enough food for everyone....some reports place the number of undernourished at over 1.5 billion. That is why so many of these GMO products are finding their way into our food chains. Most of the meat and poultry, and even commercially grown fish, are filled with growth hormones, and steroids. These "additives" don't go away when the food is processed and cooked...rather they enter our bodies, and may be a major contributor to the epidemic of Obesity that is sweeping the Western nations.
Insofar as pollution is concerned....recent studies have indicated that the amount of Methane released into the atmosphere by animal waste, and "cow farts" is almost equal to the amount of CO2 released by burning fossil fuels....and Methane is a far more potent Greenhouse Gas than CO2.
Anything that humans do seems to have a negative effect on the planet. One day, nature is going to balance things out in the human arena...just like it does with every other species. Back in the mid 90's, the UN did a population study and said that a sustainable human population would be under 5 billion people. Today we have well over 7 billion, headed for 9 billion by 2050, and 12 billion by the end of this century. Most of us will not live long enough to see the consequences, but there is going to be Hell on Earth before this century ends.