With a high frequency rate of 1,000 hertz, the Sony KD-55XD8599 has a fairly fast high frequency rate compared to most of the other 4K and 8K TVs that are a comparable age to this TV. The slowest high frequency rate of TVs of this age and spec is 50Hz, the fastest is 3,000Hz, and the average high frequency rate is 520Hz.
It may also be worth also looking at one of the alternative 1,000Hz refresh rate televisions currently available including the Samsung UE48JU7000 (£429.99) which has better reviews.
If this TV high frequency rate is not fast enough for you then you might want to consider the Philips 49PUS6501 (£489.97) (1,800Hz).
What does "high frequency rate" mean?