I wouldn't call that revolutionary. As far as I understand, this is a simple alias to something like `podman exec -it somecontainer bash`. We were able to do this for a long time. I mean, it is nice that they provide a simple alias for that. But the marketing talk is a bit much for my taste.
The feature is more similar to e.g. dockersh than just exec https://github.com/Yelp/dockersh
Or e.g. change ssh config to use ForceCommand.
That said, the main benefit is not just that a shell gets a container but that you can easily compose this feature with the container / image ecosystem to deploy specialized shells. Perhaps even you don’t need a VM to service the request but rather a container orchestrator ..