On one side, you have smaller operators like Boingo that are trying to make a go of it without anything else. My bet is that the future of such operators lies in being acquired, either by a telephone company (in that particular case, I would bet on Sprint acquiring them since Boingo already has a relationship with their PCS division).
On another side are existing large mobile operators like T-mobile who are trying to create a bundle that includes mobile phone service and data service all in one package. Those will probably continue to move successfully but will be forced to lower prices as time goes on.
Now, with the Verizon offer, I expect to see not only DSL operators (a market which has gone through a lot of consolidation, leaving mostly the incumbent telcos in charge) but also cable companies looking into bundling this type of solution. As a result, Wi-Fi may actually become a loss leader in a battle that includes a much wider range of services. What this will mean for new business betting the future on a Wi-Fi only revenue strategy will need to change their message if they hope to survive.