not for a while, i'd guess. the current line-up is still very, very good
also, what would they offer? i'm not sure if the world is ready for a 40" screen just yet, the 20, 23, 30 lineup is perfect.
20 for the low end, but which is still very good, 23" for DTP people (2 pages of A4/a full A3 spread on screen) or HD (1920x1200) and 30" for the extreme level of screen space.
they also still look stunning