Cards based on the reference design from AMD will use open air, dual/tri-axial designs rather than blower-type designs.
However, this does not mean that all future Radeon cards will not use blower designs as Scott only spoke about ‘next-gen’. We are not yet sure if next-gen is just the Big Navi or if AMD is preparing more GPUs based on this architecture. Rumors have already proved that AMD is working on at last three Navi GPUs: 21, 21 and 23. The next-gen Radeon RX is shown in roadmaps as Navi 2X.