Where's the killer app? The only one I can think of off hand is co-pilot and the reception I've seen is that it's pretty mid. Most of the proposed applications require human checking to get right which is a huge limitation to the adoption of these systems unless you accept a 3-5% error rate which is terrible. I've not met anyone who is interested in something like a book written using this thing and the main use case I've seen basically amounts to denial of service attacks with believable bullshit.
Frankly the only people I've seen who are super excited about this stuff are people in the field or the uninformed.