… We discuss the process of eliciting requirements and the publicss needs in terms of public
displays, and contrast peopless perceived usefulness of services against their actual usage as
we have recorded it. We also discuss the differences between our labǦbased experiments and
our Dzin the wilddz studies, and the implications for conducting user studies of such systems.
Finally, in looking forward we identify the challenges of designing … We discuss our
experiences from a longitudinal (soon three years at the time of writing) deployment of …

Figure 2. Version 3 of a hotspot in interactive mode. The screen is split between the UBI
channel (top left), a customizable multimedia playlist; the quick-launch menu providing one-
touch access to selected services (bottom left); and the UBI portal (right) through which users
can access 25 services in seven categories, as well as a help and survey category. displays
in popular municipal buildings such as the main library, the youth and culture center, and the
swimming hall. The public can access these hotspots only when the buildings are open.