One way to differentiate what might otherwise be a fairly ordinary broadband access service is to extend access from a "one site" service to a "hundreds of thousands of sites" service. And that's what BT hopes will happen as it capitalizes on an exclusive deal with Fon to create a huge new network of hotspots in the U.K., based on three million BT broadband access accounts. BT had been headed in that direction anyway with its Openzone program. The BT Fon effort accelerates the WiFi footprint within the U.K., and also offers connections abroad.
Greater density also makes possible more ubiquitous dual-mode mobile phone usage: which is part of why the Wi-Fi initiative made sense in the first place.
