• Steve Jobs faked full signal strength and swapped devices during the first iPhone demo due to fragile prototypes and bug-riddled software.
• Engineers got drunk during the presentation to calm their nerves.
• Despite the challenges, Jobs successfully completed the 90-minute demonstration without any noticeable issues.
Same with using a custom, presentation-only UI.
They wanted to show what it could do in a perfect setting, so they would have connected it to a remote system in the back. You never trust tech to work flawlessly for a presentation as the risk is too high.