This position paper presents a vision of Pervasive Computing as a complex and user-centric research and development object. Emphasis is put on an “augmented emulation” as a core toolkit for development and assessment of future work and we will place our proposal in the frame of some tools and work that we have undergone. We believe that developing a use-case/scenario methodology on top of this toolkit will allow evaluation of the developed technologies by using a combination of real products, prototype softwares, emulated softwares, hardware and environment in interaction with real users or agents. Those scenarios are ways of describing application needs. The refinement of elements of those large-scale real-time augmented simulations should rely on standard metric (domain specific) and user-related metrics, and will lead to more refined scenarios in a global process.