Had an interesting conversation with a friend of mine today who works in IT. He was asking about the wife's car that we recently picked up, since I mentioned it didn't have Nav. He asked if the display was still there, so when I stopped at his house I gave him a view of the Google maps view, and we chatting a bit about the lack of nav but the presence of Google.
Immediately he said "why not just offer Google's own turn-by-turn?" ... to which I mentioned that I thought I had heard such a rumor in a future OS update. Indeed, it seems like the presence of 3G data and existing Google mapping would make going to Google's own turn-by-turn the most logical step. We talked about the short comings however -- as he uses his phone to navigate and does a lot of travel for work, and has found himself in data-free areas that prevent his mapping/nav on his phone from working ideally.
It seems to me like Tesla is going to be reluctant to roll out 3G-based mapping data, because in those areas where data connections are limited, it would cause owners to potentially be lost and cause the navigation quality to be poor. Tesla is very motivated to provide high levels of customer satisfaction it seems, so I'd never peg them as willing to risk a poor review from a customer because they opted to bake in an option that was setup for potential disaster. Instead I think our option of using the ProClip dash mount for my wife, and her iPhone 6+ with nav there will work just fine (it also gives us options beyond Apple Maps, such as Google and Waze, which should prove very nice).
But if there does become a cost effective way to add OEM turn-by-turn to her 2014 60 non-tech, we'd be all ears for sure...