If you look at the fact that good old RB cd sales have stood up to over 20 years of other formats coming and going (eg. DCC, minidisc, and even mp3 and the recent stalling popularity of HDCD/SACD/DVD-A), there's your answer.
Given the size of the CD back catalog & individual CD collections, plus the backward compatability of DVD players and the simplicity of use, I can't see CD's being made redundant in my lifetime.
Given the size of the CD back catalog & individual CD collections, plus the backward compatability of DVD players and the simplicity of use, I can't see CD's being made redundant in my lifetime.