Which at the rate they ship is probably ~1m+ (3m+ per quarter). Maybe even more because I recall Sony ramps up shipments early for the holidays (bigger calender 3Q than MS relatively, followed by weaker Q4, again relative to what Xbox does vs end sales)
If we estimate ship numbers in Q1FY18 are similar to sell-through numbers during same period, we can calculate sales to consumes in different regions.
Media Create between weeks 26 and 13: (990K - 720K) = 270K units sold to japanese consumers
NPD April - June using resetera estimates: 930K units sold to consumers in US
Then, sales-through in rest of world: 3,2 million - NPD - MC = ~2 million units sold to consumers in ROW during Q1FY18.
This probably means Europe continues as the strongest region for PS4.