Steve also managed to create a company sickly obsessed with the patent system. Fostering innovation, but only if they were the ones on the steering wheel. Is that really what we want?
Sorry to burst your bubble but no. Karma gives you no entitlement to ad hominem attacks and means absolutely nothing. It's quite pathetic you looked up that guy's karma and used it as an argument. Stick to arguing the points made on the original post, please.
As it names suggests, HCI is a field that attempts to understand the way we interact with machines. The idea is that by understanding this relationship we should be able to build better designed software/hardware (or more usable, as it's known in the field). It's a merging field involving mainly psychology, design and computer science. As for how it applies to the real world, either UX design or usability engineering are probably the most commonly found examples out there.