Sony has promised to address the 4K/120 Hz issue affecting its XH90, XH900H, X9100H and XH92 TVs. The issue, which Sony has blamed on video processing, makes content at 4K and 120 Hz look blurry.
https://www.notebookcheck.net/Sony-promises-to-address-blurry-4K-120-Hz-issue-on-XH90-XH900H-X9100H-and-XH92-TVs.504369.0.html