The Odin Projector works like many different projectors, but has the added bonus of being incredibly small, light and portable. It also holds the distinction of being the first big time Android projector, providing sound and video anywhere.
Not everyone has a projector in their home, but for that issue, there's HDMI connectors. The issue with this though, is that HDMIs don't connect to phones or tablets and the projectors themselves are not portable. The Odin projector gets rid of both of those problems.
It doesn't get rid of the problem by adding an extra connector, but by literally working on its own. It launches a screen of whatever you want to watch off the Internet without the use of any other equipment.