5 paradigms of google glasses (in current implementation)

1) semi-active heads-up display - on basic funtions (hands free, ie. checking restaurants in nabe w.o looking down, etc)
2) active heads-up display (interactive with environment: maps, directions, mechanic fixing car, recording ..)
3) passive heads-up display (outside of context of immediate physical space: ie. working out while watching tv)
4) translator ("how do you say"? What did that German guy say?)
5) inverted meeting (instead of seeing each other's faces, you see what they see in real-time)