Auto visual content for video conference presentations

Many dull video conference presentations are now taking place around the world. Transmitting the video of the speaker is consuming bandwidth for no good purpose. Occasionally when chairing conferences I search for online content based on what the presenter is saying, as they are saying it, and put that on screen behind them for the audience to see. This could be added to video conference systems to enliven dull presentations. A text to speech system would provide content for searches. The Vidnami video editing system already searches out content based on a script, but not in real time.