I have been developing a small hand-writing and drawing demo application called Gribouille. It is available from a GitHub repository.
My main concern was to understand why freehand drawing apps like AntPaint are completely unusable on the Flatfish, and to experiment with solutions.
You will find details and experimental results in a blog post about it. This experiment is not easily reproducible. Maybe it would have been better to write real benchmarks instead of an app that mixes user actions with graphics rendering. But I hope it will give ideas to other people and that some questions will get answered.
Thanks for your feedback.