Well, it's up to you what you want and can do. But, for instance, your sales pitch here was "it's perfect for Big Picture". So maybe address more issues people are having with that. People want to be able to access as much of their library using only a gamepad as possible. There's a number of problems with that, especially in case of older titles. Some games only open a launcher application instead of the game itself and you need to use a mouse or keyboard only to select the "launch game" option (I think Arkham Asylum and City do that, for instance). DOS games are a chore to play using a gamepad even if the game itself is simple enough to work perfectly fine on a gamepad. Maybe you can think of ways how to eliminate more of these kinds of problems, turn your tool into a "Big Picture Optimiser" package or something. That's obviously a much larger scope than what you were going here for but I think you have to increase your scope if you actually want to make money with your tool.

Thank you for your time, I will keep in mind that and will add some other useful thing for the software.

-Future updates with more game launcher
-game boost mode (future update)
Possible place to compare price games in one place (like steam battle.net)