If you think you could do that on the beach, couldn't you do traditional software dev on the beach?
I actually think there's a chance it will shift away from that because it will shift the emphasis to fast feedback loops which means you are spending more of your time interacting with stakeholders, gathering feedback etc. Manual coding is more the sort of task you can do for hours on end without interruption ("at the beach").
How nice when just hung up with a demanding stakeholder who knows you can deliver a lot “instantly” you switch to your phone and your “agents” are just stuck into some weird stuff that they cannot debug.
I actually think there's a chance it will shift away from that because it will shift the emphasis to fast feedback loops which means you are spending more of your time interacting with stakeholders, gathering feedback etc. Manual coding is more the sort of task you can do for hours on end without interruption ("at the beach").