Now I'll start by saying, I for one think PS4 is actually undertracked/spot on, so it's more a case of wondering how & why this has happened.

Road on GAF made a pretty interesting post about PS4 sellthrough WW.

Back when Sony announced their 10m sell through to consumers figure, US sales sat at 3.8m. So 38%

The new PS4 install base of 5.63m suggests a WW install base of 14.7m.

US becomes more important in terms of marketshare at this point of the year, but maybe XB1's domination there means it actually reduced.

Road goes on to say that if the US marketshare for PS4 increased this month vs ROTW (due to Black Friday ect) 40% would suggest around 14.1m, AKA the random figure Sony posted at PSX.

Thoughts and opinions? It's a pretty big gap from what has been the norm (1.4m~)

Is under/over tracked by who vg ndp ?

VGC ...

Also, updated title to get people in here.

Arent vgc NA numbers include Canada and Mexico which makes any direct comparison pointless ?

Nope, we have US figures. Click on WW ...

I will stick by my prediction of 16mn sell through by January 1st, at most 17mn. I know I am probably way off, and hopefully it will be much higher.

Well they did announce at the Playstation Experience that it was the fastest selling console of all time so it's pretty easy to get the minimum amount it's sold.

So this is basically just slightly random speculation?

Yet the PS1 finished with a US percentage of sales of 37%
PS2: 34% (likely to be a little lower, VGC's numbers are outdated slightly)
PS3: 34%

So the trend is a decreasing percentage of total sales (PS3 will continue to sell strongly in ROW for a couple more years), also you have to take into account the monstrously large opening holiday for PS4 in America, and since then the percentage share has only been falling, with 2014 American sales being only 33%

Its actually undertracked since it should be ahead of wii