Depends on the games and usage.
Slow motion games like Simcity or Civilization V -- go for 1440p
Fast motion games like FPS, high speed racing -- go for LightBoost 120 Hz
(And if you do lots of work like programming or graphics work -- go for 1440p)
Remember LightBoost 120 Hz is more than 5x clearer than regular TN 120 Hz
For fps=Hz operation:
60Hz - baseline
120 Hz regular LCD - 50% less motion blur than 60 Hz (2x clearer motion)
120 Hz LightBoost LCD - 85%-92% less motion blur than 60 Hz (7x to 12x clearer motion)
Is most of your game motion stationary or in motion? For LightBoost, it is like getting high-definition during fast motion; fast pans are equally as clear as stationary; the 1440p goes into a blurry mess during FPS fast-pans. Can matter during competitive FPS.
But you DO need close to fps=Hz (or exceed) to benefit from LightBoost, stutter free operation (Good GPU, gaming mouse, 100fps@100Hz or 120fps@120Hz) ... LightBoost is mostly useless at 60fps@120Hz or if you have too much stutters; benefits start to show when fps > 80
Edited by mdrejhon - 3/8/13 at 8:32pm