By Gadjo Cardenas Sevilla
San Francisco- We've all seen folding and rolling OLED displays as early concepts for future technology. Lenovo showed off a complete and working tablet concept which it calls Folio. Running on a quad-core processor, the Folio can bend in half and also rearranges its user interface to fit the smaller form factor. It's a cool concept and one that extends the possibilities of the tablet/phablet form factor.