The Windows 8.1 Runtime now provides native support for Human Interface Devices (HID), Universal Serial Bus (USB), and Bluetooth connectivity.
Besides that, it also provides support for Point-of-sales (P.O.S), 3D Printers, Scanners devices.
All these are done through the APIs grouped under the following namespaces:
In other words, this suggests the single greatest merit of Windows 8.1 runtime for WinRT is that it is as powerful as Windows desktop platform.
Basically, the Lego Mindstorms EV3 is a controller for Lego - a controller is basically a micro-computer (motherboard, microprocessor and I/O) which can be program to take input data and process output result.
In robotics application, we can use the controller to serve as the body and brain of a robot, sensors such as vision as the input and the limbs (hands and legs) as the outputs.
The LEGO Mindstorms EV3's sensors consist of Touch Sensor, Colour Sensor and Infrared Sensor; it caters for USB and Bluetooth connectivity from a remote devices such as Windows PC, Windows Phone or Windows RT tablet.