Many believe wearable computers represent the next big shift in technology, just as smartphones evolved from personal computers. Apple and Samsung are said to be working on other forms of wearable technology.
The test version of Glass looks like a clear pair of eyeglasses with a hefty slab along the right side. Since it began shipping to a couple thousand carefully selected early adopters who paid about $1,500 for the device, it has inspired a bit of ridicule - from a parody on "Saturday Night Live" to a popular blog poking fun at its users.
Other industry experts take a more serious tack, pointing out the potential for misuse because Glass can record video far less conspicuously than a handheld device.
Glass also has won many fans. Google and some early users maintain that privacy fears are overblown. As with traditional video cameras, a tiny light blinks on to let people know when it is recording.
Several Glass wearers at the developers conference said they whip the device off in inappropriate situations, such as in gym locker rooms or work meetings. Michael Evans, a Web developer from Washington, D.C., attending the Google conference, said he removed his Glass when he went to the movies, even though the device would be ill-suited for recording a feature-length film.
"I just figured I don't want to be the first guy kicked out of the movies," he said.