As others have said, lots of manufacturers have far surpassed Google Glasses by now. The leaders, at least in the industrial space are (in no particular order):

1. Microsoft HoloLens - https://www.microsoft.com/en-us/hololens/buy

2. Vuzix Blade (also m300) - https://www.vuzix.com/products/blade-smart-glasses

3. ODG R7 - https://www.osterhoutgroup.com/r-7-smartglasses

4. Google Glass EE - https://www.x.company/glass/contact/

5. DAQRI - https://shop.daqri.com