I teach public speaking and I agree with him to a degree. I think there is room for a slide presentation platform that is responsive like a web site so that each slide would take advantage of the user's screen. I also think there is room for something less linear and more interactive than powerpoint. Prezi pitched itself as something like that but it ended up being all about swooping in and out. I haven't tried Prezi in years but it was also time consuming to make all that swooping in and out happen.

However, I disagree with handing the slides out ahead of time because that means that it is easier for the audience to ignore the speaker and just flip through the slides at their own pace. Now, that isn't inherently a bad thing but that isn't a speech.

He wrote: >With the screenshare, everyone is stuck with whatever I have chosen. If my font is too small for one person to read, they are out of luck.

If your font is too small for someone to read then your font is too small. Except in rare situations you should make your fonts as large as possible.

>The audience can see the speaker.

That is a disadvantage but there can be things like picture-in-picture.

>Haven't you had the experience of having the presenter skip ahead to the next slide before you had finished reading the one you were looking at?

If you have too much for your audience to read before you go on to the next slide you have too much text on your slide. Less text is better.