Gem-gum suit

comfortable everyday tracksuits

With advanced AP technology clothing can become much more comfortable. First and foremost thermal regulation becomes a thing one just don't have to care about anymore (except in rather unnatural very hot and dark climates where life supporting protection suits are necessary anyway). One can keep the same clothes independent of the whether.

With more advanced metamaterials which can emulate elasticity and actively change surface area (not shape - that is no utility fog is meant here) clothing can be made sloppy or skin tight or both on different body parts. Remote sensing for telepresence can become possible too. A simple lightweight hood with transparent visor that behaves like textile when unused and self stiffens when employed can be used to protect the face.

Means for washing ones body could be integrated too. This would especially make sense in life supporting protection suits for deadly environments.

If thermal isolation is not too much of an issue suits can be made extremely thinn without risk of rupture and thus maybe barely noticable. This works because of the very high tensile strengths diamondoid metamaterials can have.

Temperature regulation

A normally thin skin covering material can blow up a tiny bit in volume and rise it's thermal isolation to levels that suffice for every possible climate one can encounter on earth including -90°C and extreme winds on the polar caps.

Additionally one can use a heat harvesting trick similar to the one penguins use. Turning the sun facing area black (in the visible spectrum that lies way above thermal equilibrium) and the area in the shadow white this maximizes optical absorption while minimizing thermal emission.
(see Kirchhoff's law of thermal radiation, Stefan–Boltzmann law, emissivity and absorptivity)

In hot climate the solar energy can directly be used for cooling with e.g. diamondoid heat pump systems. Physical movement can be tapped as a power source too but depending on the ambient temperature it might heat you up more than it cools you down.

life supporting protection suits

Suits for extreme environments like space and deep-sea where no or too little oxygen is present need life support systems which add significant volume and mass. This won't make them exorbitant more expensive than simple AP tracksuits. Only patents and proprietary secrecy may do so when those suits first emerge.

space suits

Space suits can use the same fabric as advanced basic AP tracksuits just fortified to counter (one full nice bar of) air pressure and micrometeorites. Shielding against radiation will always be troublesome.

deep sea suits

With diamond as building material deep sea suits will become less bulky. Maybe each finger can be encapsulated seperately. They will still be fairly massive because of the immense pressures.