Executive Summary: In this research study, Nemertes performed an independent in-depth analysis of Internet and IP infrastructure (which we call capacity) and current and projected traffic (which we call demand) with the goal of understanding how each has changed over time, and determining if there will ever be a point at which demand exceeds capacity.To assess infrastructure capacity, we reviewed details of carrier expenditures and vendor revenues, and compared these against market research studies. To compute demand, we took a unique approach: Instead of modeling user behavior based on measuring the application portfolios that users had currently deployed, and projecting deployment of those applications in future, we looked directly at how user consumption of available bandwidth has changed over time.
http://www.nemertes.com/internet_singularity_delayed_why_limits_internet_capacity_will_stifle_innovation_web