@polotek It's a little handheld synthesizer / guitar-pedal-like audio filter, but it has two interesting features:
In addition to the builtin filters/synths, you can upload your own C plugins you wrote yourself.
It has a two-dimensional touch surface, like a trackpad. (The previous version had only a 1-D touch strip.) Korg's previously shown you can do really expressive performance stuff with a 2D touch surface like this wired to an audio filter. And now you can run it with your own code