I imagine this is one of those studies where laymen like me will be tempted to say "well, that was obvious, why'd they study that?" before thinking twice.
It says that the findings aren't novel, which I think means this is a confirmation of a phenomenon that was found before. It's good that this kind of thing is quantifiable and reproducible. Hopefully it helps contribute to more funding for public health and better conditions for nurses and other healthcare workers.
I'm not too familiar with the handheld PC space, but one thing that stuck out to me was the IR webcam. I wonder whether that will enable some neat things in the same vein as the Nintendo Switch's IR sensor.