But seriously, I think this sort of adds to the pile of evidence that even small amounts of exercise on a regular basis has marked health impacts.
I'm a Type 1 diabetic so I have the benefit of a sensor that continuously tells me my blood glucose, so I can see the difference between when I'm walking on a daily basis to and from the office, and when I'm working from home. Same breakfast, very different blood glucose averages on those days.
It is worth noting that exercise of almost any kind causes my insulin to potentiate, so that is part of why my glucose levels are lower. But I wouldn't be surprised to hear that my over all insulin sensitivity is higher on walking days (as I gather from this study) which helps to drive my lower glucose numbers.