Finding your way to the bathroom in the dark is a sure sign that you don't need a lot of sensory input to make your way in your usual pathways.
In fact, scientists now tell us that a majority of what we experience is not necessarily "real," but the world as filtered through our perceptions.
And we can take advantage of that fact, manipulating the brain for our well-being and gain.
Think virtual reality, artificial limbs, and more... these are among the gadgets and approaches in Kara Platoni's book We Have The Technology.
It's not all excitement about the future; cautionary tales abound. Kara Platoni uses older technology (the phone) to tell us.