Double glazed has been standard for at least 20 years if not 30 here in the Netherlands. It is primarily intended to keep warmth inside during colder periods. Newer projects tend to have triple or quadruple glazed glass with all kind of coatings. To keep the heat out in summer an infrared blocking coating is applied. In office buildings here it is more efficiënt to heat a bit more in winter due to loss of IR than to cool extra in summer.