You do have to wonder what has helped the Xbox One this January compared to every other year. The extra week can't be THE reason for its performance and being close to PS4 and Switch in units, and even the extra week of the holiday price cut doesn't tell the full story because revenue wouldn't be as close between the top 3 as it is. Something or multiple somethings kept sales afloat in January compared to previous years, where Xbox One would crater to ~150K.
PUBG is #2 in revenue on the Xbox chart, and being a $30 game means it sold a massive amount of units compared to the games below it, and was enough to hit #4 on the Overall chart. We are going to have to wait for February and potentially March to see where PUBG stands in chart placement and Xbox One in sales. February should be a great month for XB1 thanks to the 2 week price cut, but after that is a big question mark.
That means nothing. We have no idea how far it is from PS4 and Switch but that in itself doesn't matter. How Xbox One performs against itself historically is more important.
Interesting comment, and i totally agree with you. We don't have XB1 numbers yet, but is very likely the actual range for the console is 200-250K, which would be 160-200K in a 4 weeks month. Now, of course there is a big difference in 160K and 200K, but even in the probabily worst scenario, XB1 had the best MOM drop from December to January, if we esclude December 2013-January 2014 , which was still in the launch window, so better ignore that in this comparation.
In January 2015, XB1 had a MOM drop of 88.4%
In January 2016, XB1 had a MOM drop of 90.4%
In January 2017, XB1 had a MOM drop of 89.5%
In January 2018, The MOM drop is between 88.3% and 85.3% using a 4 weeks month,
Most likely (this is probabily the right range, but we can't know this for sure yet)
XB1 selling less than Switch or PS4 right there is irrevelant, the real question should be, why this year the January drop was better than in the past years? And the argument of 5 weeks VS 4 weeks should not even be a thing, because i'm already using 4 weeks as a reference. In my opinion, the main reasons must be PUGS sales and XB1X, i don't see others reasons.
February will be indeed interesting for XB1. So far 2018 start as the best year for the console, i'm more than sure that this won't continue till the end, but the firsts months of the year are still gonna be important for the system. After this great January, February looks like a strong month thanks that PUBG bundle and the pricedrop, so let's see how it can do.