A number of years ago I visited a distillery in Scotland. The official taster informed me that he could identify each of the hundreds of pure malts produced in Scotland. Furthermore, he could identify the dozens of malts in a whiskey blend, working all day at this to ensure quality control of the distillery's product. At least he's one guy who has a legitimate excuse upon returning home. I can imagine Tufts' designed optical fiber system eventually being capable of quality control for whisky, perfume, soap, and any other product sold for olfactory appeal.
Saturation is a problem with our noses.
I have tried to find a strong pleasant odor for use in an 18th century tavern I run, but find that our sense of smell is dulled quite rapidly. Presumably an industrial system will not suffer from this handicap. It may take considerable experimentation before police dogs will be replaced with an optical sensor. I give it 20 years. We already have a Breathalyzer that is ethylene alcohol specific and there are optical sensors that detect the optical rotational levels of specific gases.