I think the main problem is the visual artifacts introduced by the time-domain dithering done to compensate for the 6-bit DACs, rather than the lack of color resolution itself. This affects everyone, not just artists foolish enough to use laptops.
The fact that, to a first approximation, one can no longer buy a laptop with an LCD of the same quality as those made 10 years ago - at any price - is disturbing all in itself, and suggests that technology is marching backwards. What's next, the abolition of 44.1KHz audio?
Compare a 1980s keyboard to a modern one. It is entirely conceivable that the UI technology we will be using in a decade or two will be of such abominable quality that one might be ashamed to design it into a children's toy computer today.