Internally, we're focused on building our own technology, leveraging all the momentum that's out there around wearable computing and mobile computing and PC computing. But at the end of the day, all the code we've written and all the invention we've created has been focused on our own tech and our own products.

We're always doing a lot of user studies on health and safety. We take it super seriously. But if you look back at the history of most new big technology breakthroughs, there is some element of controversy around what impact is it going to have.

We designed a number of features from the ground up, like custom display and optics technology with very high refresh rates and pixel density. We added integrated 3-D audio, a built-in microphone so you can speak to friends inside virtual worlds, and precise mechanical adjustment systems.

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