For those out of the loop, Sony’s Blu-ray disc format is the current high definition format of choice. It beat out Microsoft-backed HD-DVD earlier this year and is the format of choice for moviephiles.
Now you’re asking yourself, “Do I REALLY need all my favorite movies on Blu-ray when I’ve already got them on DVD?” The short answer is no. The long answer is a bit more complicated and will take some explaining.
Movies have only been filmed in high definition (that is, film with a screen resolution of at least 1280x720 pixels) for the last decade, give or take a few years. If you have a standard TV (one that is roughly square), then movies or TV shows will show up as letterbox (where you have the black bars along the top and bottom). If you have an HDTV, the image will fill up your screen.
If movies have only been filmed in HD for such a short amount of time, why do you need a “high definition” version of the film on Blu-ray? You don’t. “High definition” cannot add to a movie that wasn’t filmed with HD in mind. The Sound of Music isn’t going to be any more vivid or pretty on Blu-ray than it is on VHS or DVD.
Movies that have been filmed for HD are going to look more crisp and clear than the DVD variant because they are higher quality. Do not misunderstand, Blu-ray is the superior format, but if the movie wasn’t made for HD then it’s irrelevant.
The reason DVDs became so wildly popular over VHS is because they are far more versatile, cheap, and in general are better quality. The switch from VHS to DVD was a natural progression of the market and technology. The switch from DVD to Blu-ray is a step up in technology but isn’t much of a leap in the market.
Bottom line: if you have an HDTV and money to burn, go with Blu-ray. If you don’t stick to the DVDs except for special occasions such as recent movies.