How can education use "Virtual Reality" and "Mobile Learning Devices" more effectively?

There is so much potential for education with the combination of virtual reality and mobile learning devices.  The problem is doing this effectively, safely and with a good return on investment. 

Take a look at some professors from Georgia Tech.  Their idea is not new as there are several applications doing this already.  I use this video just because it does a great job of explaining the issue. 

Do you see the potential?  Think in a micro and a macro fashion.  Think about inside of your classroom and not just on a field trip.  There is a lot of potential ... but how do we harness it effectively?  How can we make this so easy that any teacher could effectively use this in the learning process?