I could be wrong but I would imagine that Nintendo would only charge a modest royalty when a game is sold digitally, and therefore the publisher/developer pockets more money per game sale. Beyond that, the elimination of used game sales probably provides a modest boost to game sales.
If Nintendo was being very smart they would have a tiered licensing and royalty structure so that a developer earned as much selling a game for $30 digitally as they would selling it for $60 at retail; resulting in smaller studios being able to release budget priced games and still seeing healthy sales. After all, a short game like Mad World probably would have seen higher sales at $20, and if the developer still pocketed $12 or $15 they would have earned more money.







