[Holomakerbot]

Not really. Remember that before their device launched they were ridiculed for being too honest and showing the rock throwing guy demo. This was months before you could buy it: https://www.extremetech.com/mobile/273280-magic-leaps-first-...

[LegitShady]

It was hyped for a long time before that. That they released the underwhelming demo is just them failing. But they kept what it actually displayed confidential for a long time.