Fig. 11
Aggregated rankings of development challenges. Legend: bind: Ad-hoc binding/joining/leaving device groups, sec: Secure communication between devices, widg: User interface widget adoption, loc: Localization/spatial registration of devices, char: Characteristics of individual devices (e.g., contrast, input, output modalities, input output resolution), devl: Heterogeneity of development languages, op: Heterogeneity of operating systems, ntd: Integration of non-touch screen devices (e.g., Google Glass, Microsoft HoloLens), sens: Heterogeneity of sensors