Microsoft's support for Xbox 360 is no less impressive - and you can feel the difference straight away with lightning fast loading speeds. We instantly put the hardware to the test by rolling out two of our favourite games - Metal Gear Rising: Revengeance and Bayonetta. Both aim for 60fps but fall well short on original hardware. There are clear advantages to running these games on the standard Xbox One, but neither lock to 60fps, still dropping frames in the most intense scenes. Xbox One X achieves a clean result here, offering the smoothest experience we've seen.
Pushing emulation to the limit here isn't easy, but we thought we'd roll out Grand Theft Auto 4 with its unlocked frame-rate to see what happens. Original Xbox 360 hardware varies dramatically from the low 20s to around 40fps. In our tests, Xbox One X handed in performance from 35fps in the busiest city scenes to a full-fat 60fps in many cutscenes and less complex areas. It's not exactly the way we'd want to play the game but the performance bump is noticeable.