[chrisandchris]

Maybe yes, maybe no.

Take a look at the presentation of the original iPhone. It was presented (if I remember correctly) by Steve Jobs himself. But he knew exactly which buttons to press in which order, because otherwise the phone would crash.

I think such an important presentation may/must be done by the CEO, but he must exaclty know that to do and he must prepare very well.

[NotSwift]

You can let the CEO handle the overall presentation and let someone else do the demo. The CEO should focus on the overall picture and selling it as a product, while a more technical person should do the demo. I have seen this multiple time in presentations.