Remember the MiniDisk?
The UMD is just a MiniDisk with a Mini DVD and a rounded case.
When The MiniDisk came out, it was touted by Sony as the replacement for the Cassette Tape.
The UMD format has a lot money invested in it, for better or worse, and will not go away. The only thing that will change will be the disk element. It will be a BluRay Disk in the next gen & have a third corner or some other bullshit.
I judge a religion as being good or bad based on whether its adherents become better people as a result of practicing it. - Joe Mullally, computer salesman