In a pre-recorded video after who knows how many takes.
15 years ago they had the balls to run Siri live on stage: https://youtu.be/6rL9EL2LlrA?is=5yMQxs0C2VAC5Lwz
You could see jitter in the reflection on the MacBook as the guy typed, so that all looked great.
The responses came in very fast though, so I’m sceptical that the latency is representative (or that they didn’t cherry pick results, but they looked LLM generated). We shall see though.
Even for live shows they'd cherry pick specific scenarios that were known to work, and those would sometimes fail. IN a heavily produced pre-arranged pre-determined marketing video? It was as polished and made as smooth as possible.
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