I expect that it will be a fair few years before there is a viable airsoft version, although the way china steals technology and reproduces it there could be cheap clone copy out soon.
The EVS goggles alone cost just over £100, but with the complete HUD £500
Its a based on the Recon Snow 2 with some ‘Paintball specific’ software options
On its own it uses GPS, digital compass, accelerometer etc to give your position on a map. You can bluetooth link to a wrist strap controller and to an app on your phone (as long as it’s android, not iPhone when it was released but may or may not support that now)
You can use it as an MP3 player, and also view compatible Bluetooth action cameras
If you have other players using one, they grant you access to track them, and you have connectivity then you can track each other
It can connect to a compatible gun & hopper and you can see a shot count, possibly a few of the gun settings
There have been other HUD systems tried and even a similar project was using the same Snow2 HUD to produce an in goggle hud system