Of all the 3 I feel that MS has improved and continue to improve their value more than the rest.
Sony did have a better start with a better value proposal of course.
MS has managed to turn many things around towards the better.
- XBOX One shifted focus completely back into gaming,
- They managed to add backwards compatibility which often presents some performance improvement. PS4 even misses PS1 backwards compatibility.
- They now include 4k Blu Ray and 4K streaming with every new model
- Performance between the two platforms has been reduced in many cases. See BF1. Gears of War 4, an amazing game visually, manages to hit its desired 1080p res target 95% of the time and its multiplayer is 60fps with Dynamic resolution reaching as high as 1080p. Forza Horizon 3 also 1080p with superb visuals that are a match with Drive Club.
- The platform is open for some pretty sweet old school emulation
- Scorpio will be the most powerful console next year with more tangible improvements in gaming compared to Pro for those that want to take advantage of their 4k displays. The only advantage Pro will have against the Scorpio would be the only the price. Scorpio will be more suitable for premiu console gaming
- Scorpio is also expected to have performance improvements for standard XBOX One games too, but we will have to wait and see.
- I wouldnt be surprised if Scorpio will have an Oculus or Vive support and will have exclusive games. Star Citizen could be an awesome VR candidate for it.
MS is improving their value proposal quite significantly without the need for peripherals or compromises.
Sony's Pro does offer a good upgrade but performance and visual improvements are kinda mixed and inconsistent. PS VR is still trying to prove itself and is a substantial additional investment.
There is only one think Sony does better so far and thats games.
Regardless Sony hasn't done as much compared to MS because they are in the safe spot so far.