I’m a firm believer that the first commercially available head up devices will be sold to joggers and bicyclists.
Imagine going on an augmented run, where instead of just listening to music or podcast, you do that, and play a computer game for the extra motivation. Every now and then you’ll have to pick a virtual coin, or avoid some virtual danger. Think of Sonic the Hedgehog, where you are Sonic. Or you may run against a virtual competitor, which may very well be non other than yourself, as recorded on a previous run. At the very least you’ll be able to constantly see you heart rate and the number of miles you’ve already completed.
Now meet AR Walker from Olympus. It’s a simple HUD (and not available commercially), but it’s a good start. Once AR takes hold among amateur sportsmen, it will have a real chance in entering our daily lives.
CrunchGear has some more details about it.