Except: - some conf room don't have a projector, but flat screens, a smart white boards or some remote conf setup that needs you to plug in, and/or no walls t

Except: - some conf room don't have a projector, but flat screens, a smart white boards or some remote conf setup that needs you to plug in, and/or no walls that fits the bill for projection - some conf rooms don't have a place to put for your projector and get a good picture. Their is own the ceiling. - unless you buy a very good one, some conf rooms won't have the light for your projector to be readable - it addresses only the projector problem, not ethernet, sd card, usb A, etc - a good projector is way more expensive that a few dongles, are easier to break, harder to replace if lost/broken or if you forget it at home Not to say it's a bad idea to _also_ have a projector.