Aren’t you lecturing when you run a Powerpoint presentation? You’re not just reading the screen are you?
Bad presenter's use PPT to list out all their information using text primarily and then they stand there and read it to you.
I see bad presenter's probably 65% of the time.
I'm not just reading the screen. My lecture isn't much different whether I'm writing it on the projector or narrating a PowerPoint. The difference is how the students react.
When students have to listen to me, process the words, and write them down, it leaves at least a bit of an imprint. I'm convinced that when they sit and watch a PowerPoint, the content disappears into a black hole.