I've always wished there was some sort of one bit communication for "want to get a drink?" or "want to go for a bike ride?" or "want to watch the redskins game?"
How cool would it be to vibrate someone's wrist with a martini glass saying implying that I haven't seen you in a while and want to go get a drink. No need for email, calling, texting anything. Just so simple, ping someone and say that I want to see them.
I think it's a bigger deal than you realize.