CD DVD BD do we need the new 320GB disks?

I can't keep up with Blue Ray Disk (50GB capacity), there are few applications for 320 GB disks. It looks like we are due for a new "online" or USB Hard Disk storage solution.

• http://blogs.zdnet.com/storage/?p=648&tag=nl.e539
• http://blogs.zdnet.com/Apple/?p=4895&tag=nl.e539