[youtube]http://www.youtube.com/watch?v=mHLrPOTYNQg[/youtube]
Line Phone it is a mobile phone with a touchscreen and a case that has implemented tactile sensors. The concept is extremely interesting because it offers a completely new perspective on how a smartphone should be used. Note that to send a message it is enough to make a swipe, to reply the same and to change the song or change the sound level you only need a swipe on the case. The artist behind the concept claims that 3 such terminals can be combined simultaneously, so we would practically have a mini tablet in our hands.
This is one of the most interesting concepts I have ever seen. Alternatively you can see the concept for Flip Phone.