Cool video showing some prototype software to detect alternative touch modes, like pinched fingers drag acts like a pen, or wide grasping touch acts like a mouse, or knuckle drag to highlight text. I think concepts like these would need a lot of gradual evolution to make sure they are 1) accurate and 2) learnable.
Originally shared by IEEE Spectrum
https://www.youtube.com/watch?v=RMvG93DqXDM&feature=autoshare