He probably would have gone back to his entry project and perfected+expanded on it, remote/robotic surgical tools. Either that or developing something akin to new prosthetics for amputees or something. It would definitely still be something in the medical field.

IF HE HAD A SUPERPOWER: Definitely a toss up between Encouraging Words (help people feel good and fuzzy about themselves inside whoops) OR a much more refined technopathy, actually being able to talk to the tech and not just feel it.