Bitcoin transactions undependable to the Internet would be a big step and would probably be a history. The idea is good but I don't think that it is going to happen any sooner. This kind of development might took years before the success of its implementation. For long years, bitcoin had been traded and exchanged and Internet is very much needed to perform all of these and I'm sure that the Internet dependency had been talked about.
So far, ATMs are the latest development when it comes to the bitcoin usage.