Not necessarily a professional themselves, for they may be punters rocking expensive, high quality gear.
Mate: You're a dickhead. You really didnt need a camera that good just for facebook. ffs.
Prosumer: I'm looking for a new bike, any ideas?
Mate: Maybe go and get a Giant with 105 componentry; it should do the trick!
Prosumer: Mate, cmon. If i'm going to get a bike i'll prosume and get something with super record.
Also a consumer who helps design or customize the products they purchase.
Coined by Alvin Toffler in his book "The Third Wave" in 1980.