It seems that people are not satisfied with just touching screens. Design firm Pilotfish unveiled a phone that senses bending and twisting gestures for music editing. Combining those gestures with musical applications is cool. But I should note that the concept of bending and twisting user interface is not new.
Gummi Project, 2004
J. Scott, L. Brown, and M. Molloy, "I Sense A Disturbance in the Force: Mobile Device Interaction with Force Sensing," MSR-TR-2008-57, 2008.
G. Herkenrath, T. Karrer, and J. Borchers, "Twend: twisting and bending as new interaction gesture in mobile devices," in CHI '08 extended abstracts on Human factors in computing systems. Florence, Italy: ACM, 2008.