A 120mhz display doesn't mean the interface or the refresh rate is 120mhz, it means the hardware display unit operates at that speed.

Watch a baseball game on a Sony then on a Sony with 120mhz technology, it just tracks the baseball without jaggies or blurring. Same in hockey or golf.

The pixels will still operate at whatever 4~9ms they natively have, but the engine is running twice as fast. The hardware is faster so the weakest link is now the pixils themselves, not the processing.



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