WiFi is growing much faster than 4G cell towers and data capacity can handle. The only solution to eventual wireless armageddon in 2012 is unlicensed free wireless access that is in the hands of entrepreneurs and not the carriers. Carrier networks were built for voice traffic and do not scale for massive amounts of data.
The reality is we talk on our phones about 90% indoors while we are standing still. So it is not inconceivable that consumers might want a WiFi only phone. Ya but there where is the revenue in for the company? Its my belief that as CPM (Cost Per Thousand) advertising rates increase due to improvements in advertising technology that WiFi and phones will be ad supported. Companies like Apple, Google and Microsoft will make more money selling against their customers using Windows and Android phones. WiFi can actually be more reliable than 2G, 3G and 4G in the vast majority of cases. Service level guarantees are way overrated as we all know from our experience with AT&T Wireless 3G iPhone problems.