The original question was technological change. I'm not convinced that technological change in itself has had serious effects. However cultural changes that are associated with them certainly have. Traditional Christianity in the US has assumed you're a member of a Church and attend regularly. People who don't are considered "Christmas and Easter Christians." This is relatively recent. Through most of US history, people were mostly Christian but also highly unchurched.
Changes in the last few decades have made it more and more difficult to convince even people who are Christians to come to church regularly. The Church simply isn't the center of our social lives anymore. These changes have hit liberal churches more than conservative ones. I suspect conservative Christians tend to live a more traditional life, as well as having more traditional beliefs. But it's affecting them as well.
One question I'm starting to propose to my church is whether it's feasible to have Christians that don't meet weekly, but who participate in specific activities that interest them, or whether people who don't are simply going to end up agnostics.
The issues in belief between conservative and liberal Christians don't seem to be directly based on technology, but more on the attitudes towards critical and scientific use of evidence. Of course technology resulted from this, so they're not unconnected.
