Think never, general trend seems to be moving toward OLED. Unless manufacturers and drive the cost of implementing FALD to that which is below the cost of switch to an equivalent dispay outright, FALD is obsolete, only holding out in large format because cost to of OLED panels there is still too high.
Samsung just launched 2 1000+ zone FALD monitors at 1300$ and 1500$ (the cheaper one was at 1100$ a couple weeks ago). Problem is samsung is still pushing their VA panels that a lot of people still hold prejudice about because VA tech got a really bad rep. and they insist on making them very curved.
OLED is great but for computer monitors it's impossible to ignore the burn in problems, QD-OLED is supposed to improve on that but it's still to early to see the results on it.