The broader significance of Wi-Fi hotspots was noted in a new draft report by Harvard's Berkman Center for Internet and Society. The report is entitled Next Generation Connectivity: A review of broadband internet transitions and policy from around the world. The report is available for download from the Berkman Center site.
The Berkman Center refers to Wi-Fi as providing "nomadic access" to broadband, as opposed to mobile or fixed access. The current trend toward ubiquitous, seamless access therefore involves the integration of fixed, mobile and nomadic access.
Finally, I recommend the Berkman Center's new report to readers of this blog for many reasons. It contains the best comparative analysis I've seen to date of the major international measures of broadband --the ITU and OECD measures, the World Economic Forum, and Leonard Waverman.