The first question would be, without a keyboard as we access the contents? The answer is, like everything Google does: simplicity. So will all voice commands.
Although there is still no release date, Google has already launched a campaign through social networks Google+ and Twitter for those who want to buy them now. It will consist of a competition, in which a person must send 5 photos or a video of no more than 15 seconds to explain that Google would do with Glass. Unfortunately only U.S. citizens can apply. The next March Google will notify those winners who may acquire the glasses at the "reasonable" price of $ 1,500.
You can visit Project Glass
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