I believe the juicy details are "It's a marketing term for getting off-the-shelf LLMs to call out to pre-written browser automation scripts", but I'd love to hear it from the horse's mouth.
For instance, I know that a fintech company (big name) had deployed a physical android phone fleet to sign in to banks on behalf of users, around 8 years ago. That’s because the bank had used extensive fingerprinting tech to lock out any automation.
It’s sad, but the world is much less interoperable than it used to be. That’s not Rabbits fault, but obviously lying about it is.