An 8K disc format is unlikely. Here's why - FlatpanelsHD
Amazon.com: CyberLink PowerDVD 22 Ultra | Award-Winning Blu-ray, DVD, & Media Player Software | Play Virtually Any File Format [Retail Box with Download Card]
Will 8K Blu-ray become available soon? I heard that Japan has 8K blu-ray. - Quora
Overall Support to 8K UHD
8K TVs: What the heck is going on? | Tom's Guide
SAMSARA DVD 8K Ultra Digital HD Documentary NEW SEALED Region 1 *see below $26.00 - PicClick AU
Transcend TS8XDVDS-K 8K Extra Slim Portable DVD Writer Optical Drive Price In BD