The SpeedForce is an incredible device, developed by SpeedX, that brings together a whole bunch of cycling related gadgetry into a single package. This particular contraption includes a cycling computer, headlight and handlebar stem -- so it's essentially an aluminum stem that just so happens to have a computer and a headlight built into it.
The device is equipped with GPS, which enables it to communicated with the included wheel and pedal sensors to figure out the cadence and speed. The computer also uses Bluetooth to communicate with a dedicated iOS and Android smartphone for extra functionality.
Ultimately, the SpeedForce will appeal to cyclists because it allows them to make use of a number of gadgets in one convenient package.