It is an interesting idea that “Hello.Wall” tries to play a role in the background, not trying to grab people’s attention. Now ambient technologies and situated technologies become more and more popular. As a designer, we not only try to design product with good user experience, but design an implicit interaction, an subtle interaction. People now don’t need to actively react to a certain task, but the background kind of capture all the information. Once people need it, it provides people with rich context.
As a designer, we should not limit ourselves to current interaction. Though feedback from system is a guidance for designer. When situation and context is being considered by system, then it is possible to design the experience without users intentionally input.