"Any sufficiently advanced technology is indistinguishable from a rigged demo." — James Klass

In particular, voice AI systems are by their nature not very discoverable, which makes it hard to assess them quickly. What the video shows is a system that can recognize some input sentences and speak some output sentences. It does not show the size and flexibility of the command set, and it only gives a vague impression of the speech output quality and recognition accuracy.

Technically, you could reproduce this demo with the system software that shipped on a Mac Quadra 840AV in 1993.