Thanks to Brooklyn Junction, who posted a table from the 2030 plan showing that Queens will absorb about 300,000 of the 1 million additional people expected by that time - more than any of the other individual boroughs.
Brooklyn's Share of NYC's Total Population Decreasing
If you look at the comparison between 1950 and 2030, Queens will have gained 1 million people total; compare that to the other boroughs. With the exception of Staten Island, no other borough will have experienced anywhere near as much growth. In fact, Manhattan and Brooklyn will actually have lost people!