Nah, they wouldn’t be skipping numbers. If anything, they’d be going backwards.
- Xbox (1)
- Xbox 360 (2)
- Xbox 360 S (3)
- Xbox 360 E (4)
- Xbox One (5)
- Xbox One S (6)
- Xbox One X (7)
- Xbox Series S (8)
- Xbox Series X (9)
So… The next Xbox is the 10th Xbox, or using Roman numerals, the Xbox X.