PS4 here for sure, because it's a gaming console first, while the xbox one is the microsofts attempt to merge a windows media center PC with a newier Xbox. From a gaming perspective, the PS4 is MUCH more powerful machine. This isn't like last gen with the ps3 vs xbox 360. In that case while the PS3 was more powerful it was MUCH harder to code for to get access to all the power, while with next gen the systems use very similar pc style hardware. From the raw numbers the PS4 has 50% more graphics power, potentially 12% faster CPU, substantially faster memory and more dedicated to gaming as the xbox one needs to dedicate a large chunk to making the tv and kinect work smoothly.
Add in playstation plus with awesome monthly games for $5 a month (I got battlefield 3 and saints row 3 this month :-D ), support for indie games which is bringing in much of what makes PC great and of course, the price tag of $100 less, it's not even a contest. I've already cut the cord on TV, getting tv content online and outside of the US their tv support isn't going to be around at launch from what they're saying.
If TV is big thing for you and having voice powered TV is worth the price tag, then go for an xbox, but thats not why I'm buying a games console