It is necessary to increase resolution in size and accuracy for tracking, find ways to measure the forces at play, and the means to observe chemical processes at the single nanomotor level. This is essential to gain a better understanding of the physical and chemical mechanisms that take place. New measurement techniques and cross-validation by different methods will become essential, as well as close coupling to theoretical modeling. Magnetic nanomotors provide a distinct advantage in this respect since the magnitude and direction of the forces exerted by the nanomotors can be controlled externally with high precision . This can allow accurate quantitative estimates of the local environment that are not possible otherwise and may also allow more accurate targeting.