I am calling bullshit on all of their points.
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No screen, but a projector to project on your hand? WTF? So not only will it far less information, but it will be a pain to use...
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Voice commands? Meaning I will need to tell everyone around me what I am doing? Also calling bullshit on getting them to work in a busy area.
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No it can't, there are no ways to detect nutrition from a picture of a peice of food
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Privacy? Yeah, get back with me in 20 years when it has been proven to not sell, leak or have data stolen, then I'll be impressed.
In conclusion, this is as real as the Skarp laser razor is.