3000$ makes sense if you are aiming to make it hyper exclusive and say it is only a "foot in the door" product for now, kind of what the Apple TV box was for a good while.
It especially makes sense when you are developing a nascent technology and are looking to gain your foothold. And when the apps start to get in there and they have the start of a platform and some killer apps, then they release the 599$ Glasses that connect to iPhones and M-class devices. My 2cents...
3000$ is about right, basically an iPhone pro with 2x8k screens.