Of course, it was hard to compete with the flashy presentation of Google Glass, even though no new features for the device were announced. But after the skydivers landed, Brin said Google would market a prototype exclusively to I/O attendees for $1500.

The availability made the somewhat far-out project seem more real to developers.

"The fact that Glass is getting to a point where you can actually use it, I love that," Qello's Abdallah said.

Jim McNelis, also with Dito, called Glass "a childhood dream come true" and couldn't wait to pre-order the geekiest, most expensive glasses of all.

Fullscreen's Baumann imagined that the glasses could help users get instructions while they perform tasks, and could even have medical applications.