They did trial run after trial run, made sure trying to make sure there were no bugs in the demonstration path. They nailed it, presentation went smoothly, live demonstration just worked. Provisioned a bare metal instance, had it running hosting something within minutes of launch. Larry was suitably impressed, but the thing that most impressed him was that he'd been presented with an end-to-end live demonstration. It had never occurred to any of the folks involved to do it any other way, but apparently all too often, all he ever saw was slide shows from product teams, particularly when things were several months away from public launch.
I reflect on that situation from time to time, wondering at which stage you sort of go from expecting to see live demonstrations, to slide shows. I assume it just slowly slips away from you, one at a time until you're stuck in the land of "make believe we have a good product".
I used to work a very small org with an 80+ year old CEO. I feel like half the time the slide decks were unchanged and very little was getting done but I'm not sure the CEO noticed. Given the CEO often sidelined those meetings themselves, by having some bizarre senior moments. So what should be a 30m meeting always became a 2hr+ long one. The guy used to be technical but as you describe it had slipped away from him a long time ago and he had failed to delegate effectively.
Those meetings felt like my real job was just theatre for the boss in some sort of quasi-nursing home stage, where we helped them maintain the illusion they were running an entirely functioning business. I half wonder if in my short time there, I was a mug for actually doing any work.