Well, Philips seem to be pushing the limits of what can be achieved with blended materials, that is, materials that have both a physical and a digital component or aspect to them. Here are some of there new designs . It is fascinating to see how those attempts or experiments raises so many questions and issues. Once you have seen the designs, with their combinations of sensors and digital fabrics reflecting the state of the human body or mind, it is easy to expand the design space in so many directions. This is a good example of how knowledge and intimacy with the material at hand influences the possible design space. Any interaction designer or human computer interaction designer today has to include these material changes in their repertoire of thinking. (Thanks Richie for sending me the link to Philips)
Interaction Design, HCI, Philosophy of Design, Technology and Society