Giving a presentation successfully requires the presenter to keep in touch with the audience, besides all the aids to convey the information, and to keep in mind the fact that he/she himself/herself always remains POI (point of interest) for the audience. The great danger of getting lost in the presentation or the presentation media leads to an immediate decrease in the audience's attention.
Train, despite all necessary technical measures, to keep the focus of attention where it is needed: the interaction between presenter and audience.