[reticulated]

You might also find this video [1] interesting. Although it's not clear how far this company has actually got with the technology.

[1] http://vimeo.com/43431035

[stevenrace]

@1m18s you see a syringe of fluid - so it's something similar. Maybe two laser-cut capacitive films with non-conductive fluid pumped through to make static 'buttons'. Probably a better MVP than what I suggested earlier :).

Thanks for the link.