You're right, but I think this is mostly a chicken-and-egg problem; the displays are expensive because there isn't much demand for them, and demand is low partly because of the high cost. Once we reach a turning point (which hopefully will be accelerated by the release of the new Mac Pro monitor), high-resolution panel prices will drop pretty quickly.
For comparison, people said the same thing about IPS panels (and it was true for a long time), but these days you can get a decent IPS panel for barely more than the equivalent TN.
For comparison, people said the same thing about IPS panels (and it was true for a long time), but these days you can get a decent IPS panel for barely more than the equivalent TN.