Ubiquitous connectivity, how will Telco’s stay relevant

My iPhone automatically switches to WiFi when it can get it, soon it will be able to use 3G networks. On my Blackjack I use Skype for voice calls overseas. Put the two together and apart from the last mile to people without Skype why do you need a Telco in the loop. Okay they own a lot of the plumbing I am using but over time other groups will own more and more of the network and the growing public WiFi networks will only improve this situation.