One possible downside to this system is the limited storage capacity for the first-generation ReplayTV units. The three available models can hold 10 to 28 hours of video at a time - in storage space that is erased and rerecorded at will. Wood said the company plans to add external memory expansion modules in the future, but market research shows the current storage is plenty for most people. ReplayTV is not meant as an archive medium - you won't use it to collect movies digitally, put them on the shelf and save them for years like a VHS tape. The internal hard disk memory is meant purely for temporary storage.
Wood believes the new ReplayTV boxes are just the start of a digital-video revolution.
Bob Gerson, editor in chief of the trade magazine This Week in Consumer Electronics, said ReplayTV and TiVo are technologically impressive.