What do you think considering our present CD sound versus a Blu Ray type improvement?This was already done with SACD and DVD-A being the high definition audio equivalent of Blu Ray.
Psacanli (Threads | Answers)
As we know, high def audio was a non-starter except in the very small audiophile community.
Still, SACD and DVD-A do sound better than CD, but IMO, there is significant quality in redbook CDs that can be maximized with the appropriate CD playback equipment.
The question is whether the expenditure is worthwhile, and only you can make that decision.