This is an interesting little gadget that looks like it could possibly be useful.

It’s the Nav Jacket from O’neill. From what I can tell, it has a built in GPS that it uses to mark waypoints, record stats, along with track where you are. The information is then viewable through a flexible lcd screen on your sleeve. Information can also be audible through speakers in the hood of the jacket.
Along with all of that, you can also download/upload trails and waypoints via their community online.
It’s all an extremely cool little system and I could see it having some major advantages especially after the technology advances to the point that you could enter an entire resorts trail map into your jacket. However, the big problem with the jacket now is, from what I can tell they are selling the jacket on the O’Neill E-Shop for €1200. Which is about $1600. It’s cool, but it’s not $1600 cool.