The chromecast is the single most useful item to add to a modern conference room. Prior to this a massive amount of time was wasted playing with cables. The simple addition of a cheap consumer gadget allows anything that can be displayed on a laptop or a phone to be transmitted to a tv screen. This is a massive time saver and will allow the development of presentations far more interesting than dusty old powerpoint.
Chromecast for Business
Developer Rants 