I think the answer is yes and yes. And I believe this idea to be key.
His artificial life slides do show starting with simulating very simple animals.
That reminds me of something I was thinking a few years ago which I wrote in this comment: https://www.reddit.com/r/artificial/comments/8uwcq/are_worms...
See this article https://www.inverse.com/article/35862-a-i-ben-medlock-machin... I think Medford is right when he points out
> “It comes back, I think, to what intelligence actually is,” reasons Medlock. “Intelligence is not the ability to play chess or to understand speech. More generally, it’s the ability to process data from the environment and then act in the environment. The cell really is the start of intelligence, of all organic intelligence, and it’s very much a data processing machinery.”
> The organic intelligence, he says, confers an embodied model of the world for the conscious organism. “The data that’s coming in [through the senses] only really matters at the point where it violates something in the model that I’m already predicting.”
So I believe that we should be emulating the capabilities of much simpler organisms. For me I would look at something like a lizard or simple mammal first for a practical starting point, rather than simulating billions of cells and DNA machinery. But the core aspects of intelligence are right there in the cell as he says -- the embodiment, the complex model, prediction and adaptability. To me crows are too smart for a starting point.
Personally I think that what typically we think of as general intelligence or strong AI is really just a very smart animal (human), but that is mainly a matter of degree of performance rather than a totally different type of intelligence from animals. What is missing from our computer programs is the type of things that a crow, your cat, or probably even a lizard, all do very naturally. And we may be able to technically bring that down to worms or the cell even as far as core capabilities (but not practical targets for emulating).
Can we build an artificial lizard that is able to process the same high bandwidth stream of sensory data as that animal? That can output the same high bandwidth stream of motor outputs? That can see part of a predator behind a rock and realize that it must move, and plan an escape route? That can do these things in completely arbitrary novel environments? That can perform that species' mating dance to attract a mate? These are the types of capabilities I believe we should start with, based on broadly adaptable systems like advanced neural networks. So I think his artificial life slide is mostly right, but we should aim to just emulate animals as a serious goal, with the types of high bandwidth inputs and outputs and complex environments, and make sure that all of the capabilities he lists on that slide like attention etc. are derived from/integrated with powerful general purpose adaptive computation like advanced neural nets so they can handle real world complexity and performance requirements.