Within 12 weeks, Sony will release the latest iteration of its PlayStation Portable handheld, the PSP Go.
According to comments by Jeff Rubenstein, Social Media Manager for Sony's PlayStation Blog, a majority of the existing PSP software catalog -- previously released on proprietary UMD discs -- will be available for download on the PlayStation Store by the time the new system reaches retail. Since the PSP Go lacks a UMD drive, the online release of the PSP software library factors heavily in that system's success.
As of the last U.S. PlayStation Store update on 9 July 2009, exactly 50 such UMD Legacy games were available. According to various sources -- like Sony's own PlayStation.com game listings -- the PSP's domestic UMD catalog consists of around 450 games.