Great teardown video from iFixit on the Rabbit and Humane devices. The closing line also highlights why these need to be standalone devices:

Both at best should’ve been an app. But that might have more to do with the restrictions on Apple and Android’s app stores than anything else.

Easy to access, simple hardware is not only fun but also the only way to really push anything forward at the moment. We wouldn’t say that because the iPhone can run games the Nintendo Switch shouldn’t exist.