This from the folks at Hotel Online:

"Wireless HSIA continued its meteoric adoption rate, with ever more hotel chains adopting it as a brand standard, usually on a free-to-guest basis. It's not clear how much longer the hold-outs can still charge for the service, especially as they don't seem to provide any significantly better quality, speed or reliability in the connection."

I agree. The "hold-outs" will charge for Wi-Fi for at least another year or two. In doing so, they will slowly lose their loyal customers to upstart hotels who embrace free Wi-Fi as a competitive amenity. When the hold-outs awaken, they will have lost market share in exchange for minimal revenues.