One of the news items at the moment is that SMS has reached its 20 year anniversary. I happened to be working at Vodafone 20 years ago at the time when the UK TACS system was being replaced with GSM. I remember us developers being put in a room and asked to think about what applications there might be for SMS. As it happened, the largest application turned out to be raw SMS sending/receiving by users.
I suppose the lesson here is the usual adage not to take technology and think how it might be used. Instead, innovation usually comes from identifying problems and then finding suitable solutions that might or might not include new technologies.