Most people I know of that have listened to chiptune know what it is and know it's possible to compose for it.
Though I've gotten in a lot of interesting conversations.
"What do you mean, it ain't music? It's got a melody, backing, rhythm..."
"Well... It sounds like it's from a videogame."
"From old hardware, you mean. And, uh, you do realize most game devs hire musicians to put music on their games, right? I mean, the Mario level 1-1 tune? It has a composer."
Most people that you do those conversations with got an extra chromosome?