Dunno about sci-fi, but some tactical gear is incorporating D3O today (see https://www.deltathreeoscar.com/ https://www.deltathreeoscar.com/). And I suspect th

Dunno about sci-fi, but some tactical gear is incorporating D3O today (see https://www.deltathreeoscar.com/ https://www.deltathreeoscar.com/). And I suspect the most advanced stuff is not quite public.