While the concept is admittedly cool, it is just that — a concept. That means details for the final version are still sketchy, and this device could end up being something totally different or not even pan out at all.
Even if it does end up just like it is demoed, there still are issues that need to be addressed. What would the impact of the device be on vision, especially for people with certain health conditions? Can it be too distracting and potentially cause accidents? Is today’s voice recognition software accurate enough to capture all speech? And will people be willing to wear these kinds of glasses for an extended period of time?
As with any new tech, such kinks will have to be worked out. For all its potential issues, however, Google’s Project Glass sounds like something with plenty of potential.