Central heating changed clothing. In the days of drafty stone houses/castles, one still had to wear many layers. Now, only the homeless dress as kings did 1000 years ago.
I am expecting nanotechnology to change clothing once again. I am waiting for someone to invent a clothing material that functions like improved skin: flexible, impervious to viruses, capable of insulating or cooling the body underneath.
I expect it to react to hazardous objects: blunting the point of an incoming needle, turning to stone in response to a knife's edge, and catching an incoming bullet before it can damage the wearer.
I also expect it to have similar properties to a cuttlefish: changing color, flashing mesmerizing patterns, adjusting shape somewhat. That's the layer that people will tattoo, not their own skin.
Yes, it'll be expensive, but you'll only need one garment to project a million variations.
