And the upgraded specs of the system do open up opportunities a bit, don't they? I could definitely see some more full-length games being available for download, though they wouldn't be anything large like Zelda.
Some of the DSiWare games were fairly complex in their own right (Shantae, Cave Story, etc.). I'd love to see what developers could do with even more space and the system's new gimmicks to use (remember, we're also talking about 3D imagery, gyro sensor, and a fair bit more here).