Virtual Reality & Nanomachines

What I believe is that we will need to use smart nanomachines, that will stimulate the right neurons and will control electrical pulses into our brains, in order to create a virtual reality. These nanomachines will know how to behave in relation with our neurons to create a reality. Or maybe we will have special places in our brain just for them, in function to create the desired reality, when they light up, we get the right symphony for our brain.