also umd's will certainly not replace CD-roms. CDroms were the digital media standard from about 1983-1997 and are still one of the most common media types used by the Music Industry. They are cheap, effecient, easily manufactured and reliable. besides.. how many millions people own cd players or have cdroms inside their computers? and how many millions of people play DVDs through DVD players or DVD-ROM drives? Now if UMD devices cost around 150-200% more than modern media devices how many people are going to trade in their reliable machines for this new technology that no one except psp users care about?
thats right. nobody.