From my cousin-in-law Jeff at NewsFuturist, a vision that is eerily reminiscent of George Saunders's great, great story "Jon," in which the title character's view of the world is occluded by a constant stream of advertisements pre-loaded onto a hard drive installed in the back of his head:
The future will bring us heads-up displays that project our Internet data stream onto our view of the world. The location-aware data will be viewed on top of the actual location. It sounds like goofy sci-fi today, but so did the cell phone in the early 1990s. Devices to do this already exist, and will become cheaper and more accessible (and stylish) as technology improves and the mobile/data trends discussed above simultaneously create the demand for them. Short-term, this will likely happen through special eyeglasses or contact lenses. Eventually, we may have ability to feed the data overlay directly to the retina.
Please, God, don't let it come to this. (Sorry, Jeff.) I'm addicted enough as it is.