Meet the Vufine: a versatile wearable display that provides you with great picture quality on the go. It attaches to a wide variety of glasses using its magnetic dock. It has a 720p display and works with any device that outputs a 720p HDMI signal. You can attach it to your smartphone or tablet to use it as a second display. The device can also work as a viewfinder for your camera.
As you can see in the above video, it is possible to use Vufine with a drone to get a better flight experience. Best of all, this is an affordable solution. Yet another interesting Kickstarter project.