Into the Storm page 138 has the skinplant which can replicate simple things like id chips, chronos, lights.
It also says that good and best quality versions are more detailed and complex devices at the GM's discretion.
What are the most useful and interesting best quality skinplants you have seen, used, or thought up that are still reasonably a skinplant? I was thinking/hoping to get one that can function as a calculance array, but I don't know if that would even be logical.