The depths of 4K and 8K TVs that have been on the market for a similar time to this TV range from 25mm to 100mm. At only 44.3 millimeters, the UE55KS700 has a quite thin depth compared to most of the other new TVs.
There are a number of other 44.3mm thick TVs currently available that you might want to consider including because of its better review score, the Samsung UE55KS7000 (£649.99).
If you don't mind having a thicker depth then you might want to look at the UE49KS8000 (£789) (42.5mm and higher rated), or the UE49KS7000 (£645) (43.4mm and higher rated) both from Samsung.
What does "depth" mean?