The 4K display standard is likely to be immediately succeeded by its 8K counterpart in the fullness of time. ResearchandMarkets has estimated that, even though this next-gen solution only pulled in about US$2 billion worldwide in 2017, this will increase to just over $68 billion in 2026.
https://www.notebookcheck.net/The-8K-tech-market-will-be-worth-US-68-billion-in-7-years.419666.0.html