If you're a developer building a product, it's easy to put too much emphasis on the technology. While technology can play an important role, the customer experience ultimately decides whether or not your product succeeds.
Product "visionaries" are made out to be something special in the press, but you can be one, too, by being a little more considerate about what it is you're building and why.
While a pretty interface is always nice, you don't have to be a stylistic genius to build a great user interface. Focusing on tiny details like microcopy can improve the helpfulness of your app and put it above the rest in your user's mind.