G. Mark’s Answer
This is undoubtedly a very hot area. And I'm sure you're aware that it's in its infancy. There are a few areas of extremely promising technologies that are gaining momentum as we speak. Internet of Things, Big Data, Robotics with AI... The first two are symbiotic in that the IOT is generating fantastic amounts of Big Data every moment, and this fuels AI, specifically Deep Learning and Machine Learning. This is the basis of the most rapid advances in autonomous vehicles, for example. Having said all that, I think a tremendous amount of potential for Quantum Computing is in this latter area -- advanced AI. Currently, there are obvious applications in Medicine -- specifically DNA analysis and drug research. Finance will be adopting applications for QC simply because of the enormous volume of data it can make use of. But you'll probably have to wait a bit for job prospects in other areas. But then, but "a bit", I mean not in the usual sense, but "a few years" -- i. e., just around the corner. What you may want to do is look for an area that will most certainly be adopting QC and try to make it happen yourself. There are many, many people who have no idea whether QC will be useful for them. You, however, are better prepared for this. So my answer to this is that your career prospects in QC are fantastic. But don't expect to find a lot of job listings that say, "Quantum Computer Scientist", just as you will find a lot of job listings that you know simply assume you'll be using computers but don't have "computer scientist" in the title. Bottom line is that your prospects are great, but likely very small compared to what they'll be very shortly.