Most meetings with presentations include the presentation being shown through a projector. Most meetings would benefit from every participant being even more focused and paying attention vs. looking at their phones/blackberries.
Imagine integrating a cell signal blocker into a projector. Now you could turn on and off the room’s cell signal as you want to make sure they’re paying even that much more attention.
Of course, you could just also make your presentation better that the folks in the room want to pay more attention, but this is a good second step.
What else could you do in/to the room to help participants focus better?