It was quite a challenge to produce liquid crystals that could dissipate light fast enough to create 120Hz, so I would really question how well a 240Hz panel really works let alone 480Hz. Considering at 120Hz, you already need a black to black response time of ~8ms, you need 4ms black-to-black for 240Hz and 2ms (!!!) black-to-black for 480Hz.
Most panels that average 4ms or less are actually measured gray to gray.
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