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This article focuses on the new discursive practices in public speaking which have been borne out of the digital revolution (for example keynotes, investor pitches, three-minute-thesis presentations, TED talks). These practices constitute new discursive genres. They first developed in the Anglo-American context, and have quickly been adopted the world over, including France, where they have been the object of commentary in the press. The angle of investigation adopted here is that of discourse analysis: these practices inform and are informed by the social context in all its dimensions (economic, professional, technological…). In this study, these different dimensions are successively addressed, and are then illustrated in a prototypical example of a TED talk. Taken together, these practices illustrate the current trend towards the horizontal transmission of information and knowledge, together with the reorganisation of discourse communities with which this trend is associated.