Driving simulators have been around for quite some time, and some of them use head-mounted displays. For instance, a few years ago, my company provided a high-end HMD to Renault, the French car company, exactly for that purpose.
By placing two synchronized GPS devices with polarizing face plates, and using 3D glasses, it is now possible to navigate in 3D.
The benefits are very significant as 3D adds another dimension to information displays. For instance, buildings in the GPS screen cap "pop out of the screen". Congested roads can appear thick as opposed to open roads.When properly configured, rear-view cameras can provide the ultimate 3D experience when driving in reverse.
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