For example, my favorite donuts are now delivered in a re-sealable box. That's a feature. The donuts stay fresh for a week after I first open the box. That's the benefit. Understanding this difference is important.
People never buy something to get a feature.
They always buy to get the benefit produced by the feature. After listing all the benefits you can think of, list some of the characteristics of prospects whose current situation would be dramatically improved by those benefits. You should begin to see a definable group emerging as a niche or target market. Next, you want to determine if the group you've identified is a market you can reach and develop profitably. It's not a niche market for you.