In world war 2, Fighter planes where equiped with a see through plastic/perspex gunsite that enabled the pilot to see the target aircraft, and visual ranging an aiming device to target the opponent aircraft,
And all this advanced further in latter years, a la proper HUD(as said above), one has got to wonder,,
What they've patented is the way they've achieved it. I agree, HUD has been around, but it's not really practical for low cost applications, nor is it cost-effective, not to mention its relatively-poor color rendering. This new display will be much brighter, and with the addition of a touch screen it'll give lots of other options.