It's not really the same. Current TVs only show like 1/3rd of the color range that the human eye is capable of processing. Even I think the most cutting edge tvs only show 70 percent (I could be wrong on exact percentages), but either way there is a lot there that our eyes can easily process that isn't there yet.
I don't think the same is true for audio and that's just color. About resolution... no one debates if people can see the diff between 480i and 720p and 720p and 1080p versus whatever the next standard is probably not as well
We aren't there yet video. No one debates if a dvd looks better than a video tape and if a bluray looks better than a dvd.
While it is mostly accepted that there is a difference between hi rez audio and low rez there is still a lot of debate for it to be as clear cut as resolution and video...
Moreover people clearly can't hear a full 24 bits of audio... this isn't really like if you can hear over 20khz or not which Im sure some people can.. but 24 bits? 32 bits? Overkill
I don't your analogy is applicable/apt ;p