Which will happen 1st? (Wii U vs Vita vs One vs PS4)

[TheLastStarFighter]

With some intersting talk about closing of sales gaps, trends and lots of VGCharters loving to make predictions, I'm curious which of the following scenarios you thing will happen first:

1. Wii U catches Vita in total sales.

System	Total	Difference	Last Week	Weekly Difference	Weeks to Catch
Wii U	6.6	1.9	62668	27171	69.9275
Vita	8.5		35497

2.  One catches Wii U in total sales.

System	Total	Difference	Last Week	Weekly Difference	Weeks to Catch
One	4.8	1.8	63521	853	2110.199
Wii U	6.6		62668

3.  PS4 doubles Wii U in total sales.

System	Total	Difference	Last Week	Weekly Difference	Weeks to Double
PS4	8.4	-1.8	98406	35738	Infinity
Wii U	6.6		62668

 

If we use last week as the basis, Wii U should catch Vita some time next year while One will never catch Wii U and the industry will implode before PS4 doubles Wii U's user base.  But we all know we can't use one week to judge, and lots of things are going to happen in the coming months and years to change trends. So which do you think will happen first?

(Edit: at current rate PS4 will never double Wii U)