Looks great! I wouldn't be an early adopter (because I can't afford it)...but in 10 years this could be the standard. I like some of the luddite comments (on youtube) about how "distracting" or "unsafe" it is! Please, air to air combat is one of the most attention demanding life or death things you can do and HUDs have been standard forever.
Anyway, HUD in a helmet to display key info w/o a head turn or eye glance off the road is a huge benefit.
Actually, my thought was that I don't want my GPS or most any other display to be in my field of vision all the time. I would probably find myself distracted more than I do now, when I have to intentionally divert my attention to it. If it was always in my field of view, I would probably focus on the HUD instead of the road. You know how sometimes kids are watching TV and they don't notice anything else in the room? You can talk to them, walk in front of them, etc., and all they see is the TV? That's what I think would happen to me.
I would also say HUD in air to air combat is less distracting precisely BECAUSE it is extremely attention demanding. A HUD in a less demanding application will be more likely to distract from the task at hand.
I'm not against this tech as an option, but for me personally I don't think it would be a very good tool, even if price was equal to normal helmets. I would probably disable everything but the rear view, and even then I would hope it can be customized as to when it is activated.
The other nice thing would be the integrated audio, but I'm sensitive to noise, and have not ever found a helmet quiet enough that I could use helmet speakers without making the audio painfully loud. I use foam earplugs, cut a hole through the center, and stick them on earbuds.