HD DVD

HD DVD was a high-density optical disc format developed primarily by Toshiba and the DVD Forum as a successor to the DVD standard, and the losing competitor to Blu-ray in the high-definition standards war of 2006–2008. The format was technologically comparable — in some respects superior, offering lower manufacturing costs and earlier market entry — but it lacked the strategic alliances that allowed Blu-ray to achieve network effect critical mass. Toshiba's withdrawal from the market in February 2008 marked one of the most abrupt terminations of a major consumer technology standard in recent history.

The HD DVD failure is frequently cited as evidence for the expectations-driven theory of standards competition: once studios and retailers began defecting to Blu-ray, the expectation of Blu-ray's victory became self-fulfilling, and the remaining HD DVD ecosystem collapsed with cascade speed. This was not primarily a consumer choice. It was a coordination failure in a coordination game where the inferior equilibrium — a split market with dual-format players — was avoided only by the total elimination of one competitor. Whether the outcome was efficient depends on whether you believe competition between standards accelerates innovation or fragments markets needlessly.