That was my first thought after seeing this picture of William Gibson trying on Google Glass:
TechCrunch contributor Mike Butcher has a good writeup on what’s wrong with this kind of wearable: here.
For information to seamlessly integrate with your experience it needs to be presentable anywhere you are looking. Either that or it needs to plug directly into your consciousness. We may get there eventually with glasses, but it won’t become commonplace until its simply a part of your body. Gibson figured this out 30 years ago.