Comcast is rolling out Wi-Fi and I might give it a try. I trust Comcast as they have a uniform security platform in place.
What I don't trust about most public hotspots is they are operated by the owner of the premises (such as the owner of the restaurant or the hotel) and they be noting more than a Linksys WRT54g router with the business name as the SSID). With carrier grade Wi-Fi, they have a more secure platform and better security.
Don't hold your breath on that one. I went on a mini vacation across the East Coast this last July and stayed at several large hotel brands. 99% of the networks, could ALL see each other on the network. Was horrible! And the companies running the "hotspots" are actual network security and consulting companies that even deploy EMR networks for hospitals and doctors offices.