The lack of efficiency, resolution and energy cost. As well as trust on results obtained by such devices. Nowadays, we can obtain a general view of a certain area for such application. No specific details, with only normal forces applied (pressure)
Improvement of the obtention of data. Not only pressure, but also a possibility in friction forces and temperature. Having a complete solution as a skin like product. By using photonics. The sensitivity increases notably, with a possibility in changing the mechanics of the struture for different forces.