Maybe we should get an SDK wishlist going.
One thing I would really love to see is a dedicated painting program.
Have you seen Phidias? It has some advanced stuff that colours doesn't such as brush support, smudging, and other adjustments.
Honestly, using Supercard DStwo I'd love to see a painting program with these capabilities:
- Layering and transparency, at least 3 layers if possible
- Large canvas support, possibly 1024 by 768? Phidias/Colours only work at 512 by 384 max
- Basic colour filters like dark/multiply, lighten/screen, overlay, hue, colour, saturation and luminosity.
- Multiple Undo/Redo levels
The DS can already process drawing graphics pretty well, but even without above enhancements like this, the DSTwo's processor could make drawing on the DS absolutely fantastic, a real selling point.