I haven't seen this mentioned before in previous discussions, but back in 2013 they already had a working prototype of a pen attachment (on top of what looks to be a standard EMR pen) that accurately simulated texture: (At the 2:12 mark) Is it just me or does this have to potential to totally revolutionize the pen computing experience? It would brilliant as an art tool to not only simulate the canvas, but also the feel of the medium, like acrylics or oils being dragged and mixed. The possibilities go far beyond art use as well. Think of a typical UI where object handles (eg. "grab points", table dividers, and sliders) each gave a unique tactile "click" to indicate activation or a vibration-based "drag resistance" to indicate the that you've hit the limit of the control. That would be whole lot more intuitive and satisfying as as a user dontch'ya think?