Memory is getting smaller and smaller by the month. Samsung has announced shipment of 8GB microcards that can be used in portable devices such as cellphones and even in external memory adapters for a huge boost in storage. The day will come when traditional portable HDs will be phased out in favor of the more versatile flash drives which you can use anywhere - since there are no moving parts.

Samsung's high-density moviNAND memory solution consists of four 50-nanometer, 16Gigabit NAND flash memories, a high-speed MultiMediaCard (MMC) controller and associated firmware. It can store up to 2,000 songs or enough map data to implement Global Positioning System (GPS) and points of interest for the entire western world. [source]