The existence of the "Blu-ray" in the search query speaks to a desire for permanence. Bollywood films of the 70s, the era the first half idolizes, were often poorly preserved. Prints were scratched, audio was tinny, and colors were faded. Om Shanti Om acts as a corrective to that history. By presenting a version of the 70s in pristine digital clarity, it offers a "better" version of the past than the past itself could provide.
Disclaimer: This article discusses technical specifications for educational purposes. Always prefer legal streaming or purchase original Blu-ray discs to support the artists who made this timeless classic.