62% of all Americans are part of a wireless, mobile population that participates in digital activities away from home or work.
Link to Pew Internet & American Life Project article, "America Unwired".
Excerpt: Accessing the internet is for many Americans now a multiplatform affair. Just a few years ago, desktop or laptop computers were typical onramps to the internet for the tech-oriented crowd. The digerati, already accustomed to lugging their laptops around in search of ports for their Ethernet cables, rushed to equip their computers with wireless cards so they could take advantage of WiFi links to the net.
Today, the wireless router at home is the center of an untethered online access experience for many Americans that revolves around a range of devices that connect to the internet
Sidelight. According to the report, 2% of all American have an e-book reader.