Dyson almost made Google Glass. Here's an early prototype for the Dyson Halo, an eyeglass-like device that acts as a portable computer.

Here's James Dyson trying Halo out back in the early 2000s.

The prototype headset had a camera to take photos as well as capture gestures. It's removable so you can film from every angle.

The Halo was shelved after three years of development so Dyson engineers could focus on getting products into the U.S. market. Just think of what could've been!

Here, another version of the headset, with a camera.

The computer has a touch screen. You can use your fingers or a pen to control it.

This diesel trap is another lost invention. It used Dyson’s cyclone technology to capture and filter particles coming from diesel car engines.