Xbox One will support 8 controllers at once, PS4 only 4
Theres been an odd pattern emerging in this console generation transition. Microsoft is becoming more like what Sony used to be, while Sony is becoming more like what Microsoft used to be. Whereas in the previous generation, Microsoft launched the cheaper console, that position has reversed. Sony [secured] an exclusive partnership with Bungie [for Destiny DLC], while Microsoft is doing the same with Insomniac. Microsofts conference played home to the Metal Gear Solid 5 trailer, while Rockstar announces exclusive PlayStation stuff for GTA5. Whats going on???
Heres another example of the shifting tides. Xbox One will support eight controllers, while PlayStation 4 will only support four.
This is actually a reversal of the previous generation, where Xbox 360 supported four controllers, but PS3 supported seven. Of course, very few games actually ended up taking advantage of that ability. It seems likely that the next generation of games will do the same.