At the moment, I mainly use my Google Glass to record stories from my older relatives and do in car video recording (had a gopro previously), like the notifications via IFTTT about when it is snowing or raining. Also get my google now alerts, email, txts, phone call alerts on it too. Also have been listening to my google music with it too while walking about and of course the navigation features are cool too.
I like not having to pull out phone; even though sometimes it's easier. Voice control is a bit weird to get used to initially but is pretty decent. My biggest geek use of it though is controlling my Philips Hue bulbs by voice with it. Some sample pics (vignettes = overlays of photo and glass display, very fun!).
Still a lot to be improved but now that more and more people have it; we are seeing new apps each week.
and yes, i would let you try them on if i ran into you in public if you asked nicely and seemed interested
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