the last word in
/ðə ˌlɑːst ˈwɜːd ɪn/idiom
the most modern or best example of something
последнее слово (техники, моды)
Русский аналог: «последний писк»
The last word in luxury, in comfort. Не путать с have the last word — оставить последнее слово за собой.
“This phone is the last word in design.”
“The hotel is the last word in luxury.”
“In the 1980s, that car was the last word in speed.”