The thing with the Xbox One X, and with the PS4 Pro as well, is that exclusives are not allowed. Basically, any game that hits the Xbox One X must also run on a base Xbox One and on an Xbox One S- at most you can make it run better, but you can’t have an Xbox One X only game.
And according to Kai Tuovinen of Frozenbyte (the folks behind Trine and Nine Parchments), that’s holding the console back from getting exclusives it could otherwise be getting. “I think there’s definitely developers out there who’d like to bring their game to consoles, but the only thing powerful enough apart from PC would be the Xbox One X,” Tuovinen said. “My guess is there’d be a lot more Xbox One X games if they’d allow exclusives,” he said to GamingBolt.
“It seems to be like a high end PC with a 10-series GTX card,” he said. It is certainly powerful enough to render AAA games in 4K natively- although it depends on the game, according to him. “I’d think so yes, depends on the game obviously and how well it has been optimized etc.”
On the whole, while Xbox One X’s equivalence in specs will not last for long (since PCs get more powerful and capable hardware releases far too rapidly), there is little denying that Microsoft could certainly gain some great exclusives for their ecosystem if they allowed developers to make Xbox One X exclusive games- maybe eventually, that will happen.