Like most of the other best Samsung TVs, the new 98-inch QN900C has Samsung’s Gaming Hub and Motion Xcelerator Pro. That delivers 4K at up to 120Hz, rising to 144Hz with compatible PCs. There’s also support for AMD FreeSync Premium Pro as well as NVIDIA G-Sync like most of the best gaming TVs have.
I bought an Acer projector and a ceiling mounted pull down screen fifteen years ago for ~700€ and that gear is still going strong.
Why in the world would I want to spend ten times that?