VoG. I've only used Power Point to watch it on my computer. I have never attended a lecture where it has been used either. But I have been at lectures which have bored me to tears. I think the author has a few points which would probably help any one giving a lecture too. such as repeating what the visual bits are saying anyway. Maybe there are lessons to be learned here for lecturers?
I've only used Powerpoint once but I do know people who use it week in week out as part of their job. Therefore I think the professor not seeing the point. Its not the Powerpoint thats the problem, its the content of the presentation. If someone creates a really boring presentation and constantly goes over the same things again and again of course the audience will go to sleep. Its the same as someone giving a really boring speech that hasn't much point, could you stay awake as someone drones on and on about something you have no interest in? Of course not.
Theres nothing wrong with Powerpoint if the person who creates it uses it properly and makes it interesting, and of course if the audience is interested in the subject. If they aren't then the only way to keep them awake would be to hold them at gunpoint. I suspect the esteemed professor creates presentations that are rather poor, repeat themselves all the time and create and desire in his audience to cease to exist. Any idiot can read from a screen you need to make it a bit more interesting to keep an audiences attention.
In the days of overhead projectors I was often subjected to "death by viewfoil" and you can now have "death by PowerPoint". However this is not the fault of PowerPoint but of the people who compile the presentation. Over cluttered slides and repetition of the spoken word (effectively reading out the slides) and not using them as an aid to assist the audience to understand are classic examples of poor presentation technique. People should be properly trained in how to give presentations.
I should also add that too many clip art figures, duff animation, over use of fonts and colours, and too small a font size are all too frequent.