Business Insider
The Surface Hub comes with a lot of the same sensors you'll find in computers and mobile devices: cameras, speakers, microphones, Bluetooth, and NFC. There are also proximity sensors that can detect when you approach the screen.
Microsoft is really pushing this as an ideal device for business meetings. You can write on the screen, and there are built in cameras you can use to Skype with remote employees.
Matt Rosoff
It's sort of like a digital whiteboard combined with a TV that runs Windows. It's an interesting idea - it seems like it'll compete with the current video conferencing systems Cisco currently offers.