Augmented reality Apps… Cool but do they really have a practical function?

I have been very excited recently about the arrival of augmented reality Apps for my 3GS and this week I installed the Layers App. Very cool indeed but it as I went through the various databases of information I did wonder if it had a practical function. Certain functions such as the Wiki and other informational sources probably have no added value by being able to hold your phone up and obtain directional and distance data and so to for the Twitter functions, fun at first but do we really care where the tweets are coming from? I bet not one person initiates face to face dialogue as a result of a nearby tweet. The concept does however come into it’s own when it comes to the directional data. The local tube stops, banks etc is handy to be able to see on the screen rather than on maps, figuring out which direction is north, which way you are facing and which way you then need to walk. I have watched the Augmented Reality Sat Nav App video on YouTube and again it looks very cool but I have to say, even as a techy who loves the concept, I am sceptical at this stage!