You’re either on team flat or team curved when it comes to how you prefer your gaming monitors to look. Corsair’s new $1,999 Xeneon Flex, a new 45-inch OLED option that’s shipping early next year, doesn’t make you pick sides. It can morph between the two modes — sadly, not by pressing a button — but by primitively squeezing the screen together with its two handles. It requires a surprising amount of force to pull it into a curve and to push it ...