Just to comment that it will only get better! I'm very much aware of how amazingly good Redbook can sound, in my experience there are almost no limits to the level of listening quality that can be achieved, even on the most unlikely CDs - the industry is now in a significant learning phase, and more and more gear will be of adequate quality to get the job done ...
CD makes a good case for taking the longest of all the established formats to mature. Of course we might also say that today - in 2016 - we are getting more out of the long playing record than we ever did before, but unlike CD, that format has been sounding wonderful for many decades. I am still always aware of the inevitable compromises in having to squeeze music - especially orchestral music - into a 44.1 KHz, 16 bit package and it remains a constant source of annoyance to me when I see day after day how much easier it is to cope technically (and thus musically) with something as unpretentious as 20 bit, 48 KHz. But CD is what it is and it is great we now have a means - albeit a very expensive one - of delivering the full theoretical potential of the format, compromised though it is.