One more thing…

Steve Jobs created anticipation and excitement when he would announce "one more thing" at the end of a presentation.

Sometimes that one more thing was just a color for a product. Other times it would be an entirely new product or feature. It was so effective because Steve presented these as a bonus. That there was a goal being stretched further to create a unique opportunity that you get to be in on. It also shows that Apple is pushing expectations by continually adding one more thing.

A presentation can create an experience larger than the product being showcased. Being a good communicator has a dramatically valuable effect for anyone who presents regularly.

Related to this, Apple Explained created a great "History of 'One More Thing…' Compilation" on YouTube.