One issue with public speaking with a presentation is that it tends to lean towards speaking TO the audience rather than speaking WITH the audience. Google just introduced a nifty feature called Slides Q&A.
With Q&A, the presenters now can insert a link into the Slides presentation, and the participants can submit questions from the smartphones or laptops while they view the slides in real-time. Additionally, the audience can vote on which question they want the presenter to answer the most. This adds an element of interaction with the audience. I know of no other presentation software that does this.
Watch the video below to see the feature in action.
Google also introduced a new laser pointer option on the web.
For information on how to implement Q&A, here is the link to the help article.