Its an interesting idea, though he did start to lose me when he started pitching snake oil style lists of benefits regarding brain health and doctors telling parents to feed their kids lion meat. Interestingly I noticed I had different reactions to the thought of eating different animals. No issue with the herbivores (giraffe, zebra, etc.) but a very negative reaction to the thought of consuming big cats. Not sure why. If there is a way to verify the source of the protein (animal type) by a government regulator I would be willing to give it a go.

While its far in the future I have always liked the idea of space missions being able to take cell cultures and grow their own protein removing their reliance on earth based food supplies. Makes the idea of a generation ship more realistic (although still terrible for the generation that are born, live and die on it)