The presentation can be shared with everyone and any viewer can follow the presenter or take control of the presentation. The preview includes a group chat feature based on Google Talk's gadget that shows the active collaborators and viewers. If all the viewers click on "View presentation", they can watch the presentation at the same time.
Google continues to compete with Zoho and SlideRocket for being the online presentations champion. Today Google rolled out completely new Google Presentations editor. It adds more than 60 new features, but the main one - is the ability to collaborate on a presentation in real-time. Everything is very similar to collaborative tools in Google Docs and Google Spreadsheets that appeared last year: in the right pane you can see who is currently working on the presentation, chat with them. And in the presentation view, you can see what objects the collaborators are currently editing (these object are highlighted with the corresponding colors). And with the help of Google+ Hangouts you can even video chat with colleagues while co-creating the presentation.