Will Google Map JS API 3 require an API key?

I did not find any indication that I would need an API key, and in fact I am using it without one. Did they announce that they were doin开发者_如何学JAVAg away with API keys or that the key would be implemented later?

It says, "This version of the Google Maps JavaScript API no longer needs API keys!" However, I don't see (or expect) a commitment that they won't require one again later.