I'm delighted to see any and all advances on technologies that satiate our desire for meat without the ecological impact of meat. That said, oysters are probably the meat least in need of a plant based substitute.

Oysters don't really have a nervous system to speak of. Being roughly equivalent to a carrot in terms of capacity to suffer means there isn't really an ethical reason not to eat oysters, unless someone just doesn't like the idea of eating something that is taxonomically in kingdom animalia.

And oysters improve the environment where they are farmed. As such, I've been told that oysters are something of a virtue good. That is, the more you buy and eat, the more the environment is improved in the areas where they are grown.

Lastly, I don't know about the nutrition of real oysters, but I'd imagine they're pretty healthy—high in protein, low in the kinds of fats that you wouldn't want. They mention potential for food-borne illness with real oysters, so I guess there's that.

Kudos for for making this, but their upcoming squid and scallops would seem to have better ecological / ethical comparative advantage for the target audience.