Improvements: Sony vs Microsoft

Note that in this list, I won't include graphics or speed because it's obvious that both companies improved that.

I'll start with how PS4 is an improvement from PS3.

1. Sony has added party chat. (which Xbox already had)

2. Sony has added indie games. (which Microsoft already had)

3. Sony tacked on a touchpad on the controller.

4. Sony added PS App (clearly trying to replicate SmartGlass)

5. Sony tacked on a lighbar on the side of the controller you can't see unless you tilt your controller awkwardly.

6. PS4 can play a game while downloading it.

Now Microsoft:

1. Microsoft added extensive amounts of multimedia.

2. Microsoft added a ridiculous amount of multitask.

3. Xbox Live will now have 300,000 servers. And through that $50 per year fee, that number will be growing.

4. Microsoft improved the achievement system tremendously.

5. Microsoft added a Blu-ray player. (yes, PlayStation already had that)

6. Microsoft completely reinvented the Kinect and it now works flawlessly. It can see the slightest shoulder rotation and understand your words like a human.

7. Microsoft added face recognition. It will sign you in automatically and take faces it doesn't know and sign them in as guest.

8. Xbox can play a game while downloading it.

9. Microsoft added extremely strong controller vibration to make games feel more immersive.

10. Microsoft reinvented the voice control system. It even hears your commands when it's turned off. (No, it doesn't spy on you. Proof: http://www.escapistmagazine.com/forums/read/7.822806-Microsoft-Vows-To-Fight-Government-Spying-Via-Kinect )

11. Xbox Live will now offer virtually  unlimited friends. The current limit is 100.

Overall:

Xbox One is a Complete reinvention of the Xbox 360. Every thing was improved and tons of things where added.

PS4? Adds a ton of things that Xbox 360 already had, tacks some things onto the controller, and plays games while downloading them. (So does Xbox One.)