Dear friend, welcome to HCM.
hyperareated lungs means emphysema in medical terms. it means distended air spaces . occurs as a normal phenomenon with aging , called senile emphysema
in smokers, it is a common pathology and leads to breathlessness , and progressive decreased lung functions, some develop heart dysfunction secondary to it. rarely a distended airspace may rupture causing serious sequelae called pneumothorax
some are due to hereditary enzyme deficiencies.
(effect of smoking on others around) does affect lungs to certain extent.
but pl. ask the radiologist
if the hyperinflation is much enough to be called emphysema, or it is just an end-inspiratory film?
your breathlessness after coffee can not be explained with this info. pl. post more details of your problem, so that I could help.
take care and keep me posted on your progress.
Good luck !