During the lengthy Q&A Apple issued in the form of a press release over the whole location tracking fiasco, the Cupertino-based company said that they are working on an improved turn-by-turn navigation system by collecting "anonymous traffic data" from iDevices. This sounds like a separate thing from the cell tower triangulation. Here's what that particular portion of the Q&A says:
What other location data is Apple collecting from the iPhone besides crowd-sourced Wi-Fi hotspot and cell tower data?
Apple is now collecting anonymous traffic data to build a crowd-sourced traffic database with the goal of providing iPhone users an improved traffic service in the next couple of years.
It's likely to be a more fully-featured navigation system than what the iPhone has now (which isn't all that great, let's be honest). Website MacRumors points out that back in November 2009, Apple has a job posting calling for an iPhone engineer to take such maps "to the next level." Then in December of 2010, four more listings came up from Apple looking for those with know-how in developing navigation software. Now it looks as if Apple has finally decided to come out and say "yes, we are working on a turn-by-turn navigation system." They are also saying that there is some data being collected for this, as described above.
Currently, the system in the iPhone isn't the most advanced for traffic. It's actually pretty weaksauce. If this improves it, that can be a good thing.