It's a screencasting system project based on a Pi 3. Nothing very new for such project except that it aims at being very user friendly. Easy setup for users on Windows, Mac and Linux.
User connects to the Promys Device Wifi access point, visits the embedded web page, downloads client application from there and starts it. Almost as easy as ClickShare from BARCO but at a reasonable price (~40€).
It's NOT like a Chromecast device, guests don't have to join hosts wifi network. It's suitable for companies that would like to offer easy screencasting to visitors and employees. It's more similar to Clickshare. I don't see a point using it at home, but, why not?
An already made system image is available on the web site (see below), so it should be very straightforward to setup a Pi3 out of the box and have an up and running system.
For the moment it is very basic but it can be extended with plenty of nifty features. Check out TODO/Ideas section for that and feel free to contribute.