Sometimes hyphenated, sometimes not. Most commonly heard in car commercials, eg "Introducing the all-new 2010 Cadillac SRX Crossover". I've only heard it since moving to the US so perhaps it is a North American thing.
Does the "all" actually convey any specific meaning? Am I losing anything by interpreting "the all-new 2010 model" as "the 2010 model"?
Best Answer
The phrase "all-new" in advertising simply emphasizes that the product is completely new. It is not simply a new name or small iteration from the previous model — everything about it is new, so it must really be worth buying!
(Naturally, in the world of advertising, what they say is prone to extreme exaggeration!)