A:Answer 120Hz.
If you can tell the difference in images where a unit has 240Hz (or higher) refresh rate, versus this units 120Hz rate, you've some seriously awesome eyesight. Indeed, standing ON TOP of the screen _may_ display pixilation on the slower unit, and mind you that's on scenes where there is a LOT of "action" in one frame, even then it has to be a constant motion that lasts for good length of time.
But for the most part, I'm not certain if someone put two (2) 65" TVs in front of you with the exact same content being displayed (and the images color/contrast/sharpness, etc are IDENTICAL) where one of the units has 120Hz rate and the other a 240Hz rate - that you're (REALLY) able to tell the difference until there's an action scene with a LOT of movement. Even then, 120Hz rate will demonstrate to be sufficient 99% of your viewing time.
That's a tech-spec that's the same on _MOST_ of today's units anyway. Sony or otherwise.
