"Powerpointlessness"

This is a fantastic description of what I have witnessed for years in the Corporate world. PowerPoint presentations with nothing to say that kept getting fancier and fancier. Then to really add some flash, some of my competitors were hiring professional salespeople to deliver these fancy PowerPoint presentations......the blind leading the blind!

So, "pointless" because the presentations can become an end unto themselves with nothing much to back them up. "Shallow" would be another good descriptive term to use I think.
From presenters who read what is on the screen and can't answer one in-depth question, to slides with so much small print text that the presenter finally gives up and says"you'll get a copy to take home and read for yourselves".

I would think that one way to start making sure a PowerPoint (.ppt) has depth is for a teacher not to simply say "we are making a PowerPoint presentation". Using a .ppt is really a method to use for presenting a report, product, research results, etc.....The focus should be on the content of the project - not the method.

Once you have your content, then utilize the .ppt to its fullest extent and robust capabilities.
Always remembering, that your basic skills of good presentation, eye contact, passion, knowing your subject, will not be replaced by your .ppt.