Well, there is not so much magic going around here. A better name would be a Smart Mirror. Basically it is nothing more than a monitor behind a double-sided mirror, powered by for example a Raspberry Pi. A double-sided mirror is not a regular mirror, but it’s reflecting coating has about 70% reflection and 25% light transmission. So if you place the 'glass' on a dark surface, you would see just a mirror. When you however put a light source behind it, you’re able to see through it. If you put a black page on the monitor, add some widgets on them, they seem to be part of the mirror’s reflection. A Magic Mirror is a great and simple example of an 'internet of things' device.