That is less consequential at HN than elsewhere, since most of the community here already is in web apps. However, even if you'll never touch desktop software, you may find the points about AdWords and conversion math worth your while. (They're about halfway down.) The short story is that anything you do to increase your conversion rate has a side effect of increasing your ability to win the AdWords "auction", which means you get additional benefit (increased volume) above and beyond the base increase in conversion.