The Xbox One X will support 1440p displays

The Xbox One X is being marketed heavily as a 4K-focused machine, but it turns out that’s not the only way to get greater resolution than 1080p. Unexpectedly, the One X will also natively support 1440p (2560 x 1440) monitors, as confirmed by Microsoft’s Kevin Gammill on Twitter.
1440p is a popular resolution for high-end gaming monitors, particularly among players who like to prioritize framerate. While it’s unlikely that many developers will specifically target 1440p displays