Semantics has recently become a promising candidate panacea to computing scalability problems. However, this rather ambiguous candidacy title does not specify how this solution should be fulfilled, i.e. what steps must still be taken and which objectives must be implemented to provide truly scalable semantic computing platforms. The purpose of this conceptual roadmap is to address the scalability challenges within specific areas of semantic computing, to provide achievable solutions based on ongoing research and development, and to present a coordinated overview of what must take place in the next five years in order to achieve worldwide scalability.