I had a vision that in the near future electronic gadgets would be miniaturized to the point of view – and therefore their body would be jewelry.
The future of the century will appear,
as the classic "elphic" armbands or tiars - with a projection "self-flower" in the center (googling glasses in this sense - a deadborn idea)
A set of fingers on the fingers as spatial manipulators. The rings will be soft and discreetly (like a mouse wheel) rotating around the fingers.
That is, in the near future, in front of the face of every passenger of the subway will hang a semi-transparent cubic meter of display, in which you can drive the cursor with your fingers and throw chickens in pigs from scale.
c) Look for yourself