I said this about 7 years ago...
And now its financially possible.
http://www.reghardware.co.uk/2007/10/19/universal_replace_cd_music_with_usb/
Essentially, there is no need to have moving parts for anything - such as music or movies. Now that Flash is cheaper to make/buy (or are we relying on cheap chinese labour?) it is sensible to avoid moving part issues.
This means...things get smaller and more space friendly.
Plus, nothing skips!
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tnn