There are many businesses that make use of Blu-rays and DVDs. A DVD rental shop might have them playing in the background, or someone selling a TV might use them to show off its image quality. But there are some important things to bear in mind when using Blu-rays and DVDs for business use.
Blu-ray is the popular, higher quality choice when DVDs and Blu-rays are put in direct comparison. While Blu-rays can deliver extremely crisp and sharp images, some Blu-ray discs are not much better quality than that of the cheaper DVD. If you can, always read reviews on the Blu-ray quality before buying.
Some films, such as older black and white movies actually look worse in an up scaled Blu-ray resolution. The high pixel count can often destroy the film grain effect that the producer of the film had to work with when the film was made.