“Most user studies in the past have focused on the use of static devices. What are the new challenges to us, as designers and evaluators, on how to approach the design and evaluation of multimodal mobile devices and applications? In other words, function, value and meaning are relational and not absolute, as the applications and services reside on the network and not on the device. From the point of view of design and evaluation this presents new challenges. But why should we be interested?”