Setting the scene
Studios wanted a successor to DVD that could hold 1080p video and lossless audio without splitting films across multiple discs. Sony's Blu-ray camp eventually outlasted HD DVD in a standards fight that recalled VHS versus Betamax marketing déjà vu.
What happened
Early adopters grumbled about firmware updates, region coding, and slow disc load times compared to instant DVD menus. Game consoles like the PlayStation 3 doubled as affordable players, spreading the format faster than standalone boxes alone could.
Why it still matters
Physical media sales peaked then declined as Netflix pivoted to streaming. Memorable detail: the name Blu-ray references the blue-violet laser wavelength used to read smaller pits than DVD's red laser.
Background
Blu-ray briefly mattered for videophiles and collectors before streaming bandwidth caught up and optical drives shrank on laptops.