Wonder how 4K would have been handled if HD DVD won the format war?

[rdodolak]

Originally Posted by LexInHD

Well, they would likely used quad-layer 60GB discs with HEVC, if they could get the disc replication yield worked out and didn't have to use expensive new machines or replication upgrades like Blu-Ray required. Toshiba was working on triple-layer 45GB discs when the format tanked and that probably would have barely been acceptable for UHD content, with no real extras, as BD-50 and BD-66 were included in the UHD-BD spec in order to utilize the available replication hardware and you'd obviously want the higher-capacity for quality, so long as the yields were acceptable.

Blu-ray was also working on 3 and 4 layer discs as well at that time.