From what I understand in the article the prototype TCL panel being demonstrated is actually 4k@1000hz. They mention a few competitors with multiple modes right after which could be where the confusion comes from.

If you’re coming from newer Metroid titles you might want this. It is a romhack that has a number of quality of life patches like GBA-style missile and aim controls, faster door transitions, and not locking backtracking from the final save room, etc.