240 Chapter 9 distribution may give them the best way to do this, particularly with current DVD (red and blue laser) and optical player technology. It is likely that online distribution will exceed physical content distribution by the 2010 decade, but that will probably not eliminate physical content distribution. Optical disc rich format content distribution will likely continue to be the most assessable and cost-effective means for commercial content distribution. This also fits into the current distribution models, including online purchase of such content. Physical content, if content protection allows local working copies such as on a home media server, can provide an effective backup of that content. Also, the content can be restored to the media server from the original copies should the media server content become corrupted. 9.4 Personal Memory Assistants In earlier chapters we described a life-log that could record images, sounds, time, and location of experiences of a person during the course of his or her life. Such a life-log could be the basis of a device you can carry with you that can act as a Personal