> From the famous "Hello" Mac introduction in 1984
I feel like that's a little different. The Macintosh demo was obviously a "sizzle reel", not an example of how the machine would normally behave in use. No one would have watched the demo and expected the computer to talk to the user when turned on.
A more interesting reference point might be the iPhone intro, which wasn't "fake", but did rely on a carefully orchestrated sequence of events to avoid known bugs.
The 1984 Macintosh demo also wasn't running on a stock Macintosh, but rather an expanded version of the hardware. So, as well as being a slideshow of sorts it was slightly disingenuous as to what the hardware was capable of.
A certain degree of smoke and mirrors to generate hype around ground-breaking tech is the norm, not the exception. This doesn't necessarily mean that the product itself is a scam.
[1]: https://www.folklore.org/Intro_Demo.html