This really seems like a huge Solution in Search of a Problem. The problems he mentions are:

1. you have to fumble with your phone to look something up

2. you sometimes bump into other people on the street looking at your phone

3. screens are bad

Are those really big problems? Are they big enough that I need to learn how to interact with an entirely new interface? It's obviously incredible technology, but I just don't see people walking around with these things and talking to them.