greatest thing since sliced bread

Etymology
Adapted from the advertising slogan used in 1928 by the Chillicothe Baking Company (the first company to sell sliced bread), which was as follows: The greatest forward step in the baking industry since bread was wrapped.

Noun

 * 1)  Something amazing, outstanding or praiseworthy, especially a relatively recent invention likely to improve people's lives.

Translations

 * French: mieux que le fil à couper le beurre
 * German: das Größte seit der Erfindung der Bratkartoffel
 * Swedish: det bästa sedan skivat bröd