Why Xbox One is simply the smarter purchase:

1. Multimedia/Entertainment

The Xbox One will offer every type of media we use every day. (Live TV, DVD, Blu-ray, Netflix, music, etc) While that has nothing to do with gaming, that means you no longer need anything you have plugged into your TV. You can just sell all that stuff! That also includes your cable box. No more expensive monthly bills for live TV! You will only need One thing plugged into your TV and that's your Xbox One.

2. Technology

The PS4 will be a good piece of technology. The Xbox One will be better.Why? The Xbox One will be able to do up to four things at once. (It won't split screen them though but why would you want to split screen four things at once?) You might want to play a game, while downloading it, while watching a YouTube tutorial all an the same screen instead of doing one thing at a time. All with the power of your voice. The Xbox One will offer voice controls unparalleled by anything but Siri. It's accurate and understanding and you'll be able to access literally any feature of the Xbox One through it. The Kinect sensor has also been massively improved. (See my "Improvements: Microsoft vs Sony" post for details on the Kinect)

3. Gaming

The Xbox One also had a massive focus on gaming. It will have faster multiplayer, more, and according to E3 better looking, exclusives, a better achievement system, virtually unlimited friends, and more partnerships (meaning more exclusives, DLC offers, and apps) than the PS4. Microsoft has also put effort into the SmartGlass. Now, I know what your're thinking: "Uhhgg, SmartGlass is SOOO stupid." Well it used to be. However Microsoft made it clear that game developers will be taking advantage of it in tons of interesting ways. (Such as landscaping in Project Spark, or dropping supplies and missiles in commander mode in Battlefeild 4) The graphics for both consoles are pretty much the same. Xbox One has a GPU of 853 GHz while PS4 has a GPU of 850 GHz.

Overall:

The Xbox One conquers PS4 in almost every area. Entertainment options? Xbox One has more. Multiplayer? Xbox has 300,000 servers and virtually unlimited friends so it wins there too. Voice commands? Xbox wins there too. New/different ideas? Xbox has more (SmartGlass, Kinect, etc). Partnerships? Xbox dominates. Exclusives? Xbox has more.

Xbox One is simply the smarter purchase.