will PS4/One take off right away?

[JEMC]

Hard to tell.

Both can do better than WiiU mainly because they won't have game droughts like those of Nintendo's console, and PS4 will do better than Xbox One thanks to its price advantage and the fact that it will be available worldwide, unlike MSoft's console.

So, Xbox One may do like WiiU or a bit worse (the extra games probably won't be enough to compensate the extra 150 $/€ and the reduced countries where it will be available), while PS4 will probably do better than both, but not enough to be called take off.

As Conegamer said, until PS360 start to get less support, its sales won't take off.