However, if the next-generation consoles enjoy a lifespan similar to that of the current crop, then it is likely that internet speeds will have improved enough over that time to make disc-free consoles practical.

FORBES: PlayStation 4 Was Almost A Discless Console

Such heterostructures are widely employed to make the lasers in compact-disc players and retailers' laser scanners.

ECONOMIST: Microelectronics

They were expected to make up a bigger slice of disc sales after Blu-ray won the backing of Hollywood studios earlier this year over the rival HD-DVD technology.

WSJ: Retailers Slash Blu-Ray Player Prices