Solid state drives, such as thumb drives and flash drives, are another place many are looking for the future of video. At first glance, it looks like an appealing alternative. Flash drives, like those used with digital cameras, are extremely small, and models which have enough space to hold a high-definition movie are not hard to find. Flash drives also provide good read/write speeds, would eliminate the need for noisy moving parts, and would reduce the shelf space required to display films in stores.
The format also provides great promise for compatibility between devices. Currently there is no physical media that is good for use between all different kinds of devices. A Blu-Ray disc could never work with an iPhone, for example. Flash drive slots are small, however, so devices of all sizes and types could use them. This would reduce shelf space further and it would make things similar for manufacturers by allowing for all movies to be made using a single universal format.
It sounds, sweet, but there is a hitch - cost. Flash drives are much, much more expensive than DVD or Blu-Ray discs, rendering them impractical for use as a media for selling movies. That said, costs do go down frequently. In five years this idea may be more practical.