I figured I'd start a new thread specifically focused on Anoto. They're the OEM maker supplying the stylus tech used in Panasonic's 20" 4K Toughpad; http://forum.tabletpcreview.com/thr...let-sports-4k-display-runs-windows-8-1.58477/ Anoto's approach to the digital stylus is based on a system of optics, using a small camera in their pen designs which reads a film integrated in a tablet display which is printed with dots visible only to the camera (in the IR or UV range?). It's an old idea which has never taken off, but which offers some interesting advantages over the EM and electrostatic solutions we see in current popular use. -Among them are pinpoint accuracy, elimination of palm-rejection issues and easy scaleability. -If you want to have a really big drawing surface, you don't have to specifically formulate an antenna system tweaked for a new given size, (as Wacom must do); you just cut a sheet of dot film to the size you want. This allows for truly huge drawing surfaces, as seen in this demo video... Anoto may be worth keeping an eye on; HP signed a deal with them recently to use their technology in some upcoming devices set to arrive, possibly in 2016. (Discussed here.) They also, earlier this week, (Dec 7, 2015) announced the acquisition of the California-based digital stylus company, Livescribe. https://www.livescribe.com/blog/noteworthy2/2015/12/anoto-completes-acquisition-of-livescribe/ Livescribe was already licensing Anoto's tech for their line of digital pens. What will become of their activities.., who can say? But one thing is certain; this small Swedish company of 100+ employees isn't sitting on its hands and they have some unique ideas to offer to the field of digital writing/drawing.