There are presently slightly under 1.5 billion PCs connected to the Internet, and just over 1 billion net-enabled phones. Mike Nelson (former director of Internet Technology at IBM, the former director of Technology Policy with the FCC, and a professor at Georgetown’s Communications, Culture & Technology program) estimates that as we move from an “internet of PCs” to an Internet of Things, that there will be roughly 100 billion net-enabled devices within the next 5-10 years.

More on this in Hammersmith’s upcoming Networked Objects and The Internet of Things report.