From the latest edition of Unvalidated Ideas:
Almost every industry has conferences, and at those conferences people give presentations. Right now, people build their slide decks, powerpoint presentations or regular PDFs and hand them to some organizer whose job is to make sure that they show up on screen.
Sometimes, event attendees will even bring their own laptops and struggle with conference room AV equipment to get their message on screen. It's almost barbaric.
Build a HDMI presentation stick that plugs in a display for presentations. Like a Chromecast, but tied to presentations and (completely untied to Google).
(Read the rest in the latest edition!)