We talked about his below in response to a GG video if you missed it - I think the Monbiot vid in my post is quite good - the follow up posts are more useful.
I'm not too bothered by insect burgers (or whatever) if it's the only way we can do it in the end (cruelty to insects is still cruelty though) - bacteria-protein burgers may be better in the cruelty stakes and not too far off if you believe the Monbiot vid (lab-grown meat is further off, as me and Ian discussed).