I bet they rehearsed a dozen times and never failed as bad live. Got to give them props for keeping the live demos. Apple has neutered its demos so much it's now basically 2 hr long commercials.
0.https://web.archive.org/web/20250310045704/https://www.nytim...
https://www.youtube.com/watch?v=DgJS2tQPGKQ
Microsoft really nailed the genre. (Although I learned just now while looking up the link that this one was an internal parody, never aired.)