Here's a great example of why Augmented Reality interfaces (and Virtual Reality for that matter) isn't just a gimmick - it has the potential to save lives.
These researchers from Duke University are looking into ways of using the Microsoft Hololens to give neurosurgeons a better view of the brain in cases where they'd otherwise just have to take a stab at it (excuse the lame pun).
Their demo is obviously in the early stages and nowhere near ready for live use, but it's clear that there are uses for AR/VR that will greatly benefit the general public.
AR/VR is no longer just about "cardboards at a tradeshow". It's now tech that we all should start embracing as an integral part of our lives in the near future.
One of the several things that makes brain surgery so difficult is that the brain isn’t transparent. So if you want to get at something deep inside, you either have to peel off a few layers or make an educated guess based on other imagery. But augmented reality may offer a third way.