It's clear that HDDs will soon become obsolete even when it comes to capacity, but the enterprise sector is still relying on these devices because SSDs still cost a fortune in large numbers. Seagate's latest Exos 14 TB HDD is primarily aimed at the enterprise sector, but IronWolf and Barracuda versions for NAS and consumer markets are also expected in late 2018.
https://www.notebookcheck.net/Seagate-Exos-14-TB-HDD-coming-soon-to-consumer-markets.308118.0.html