When are February NPD numbers due?

Physical release-March 14 (when leaks happen)

Physical+Digital-March 19 (public release)

Do you guys think that the Switch will be able to keep up its pace when the new Playstation and Xbox are announced/released?

It's Nintendo IP and the form factor that is selling it, not third party games. As long as we get high quality games from Nintendo and it's partners to support the system it's gonna sell well.

I don't see why not. The PS4 also didn't slow down when the Switch got released, after all. They are simply too different to hinder each other's sales.

Just posted Week 7 Numbers the deficits for the PS4 and Xbox One are now over 500k and 200k respectively.

Switch is selling 22,4% more for this Q4 compared to Q4 2017.
Good knowing that this is only with Super Mario Bros U as new release.

Week 8 Numbers have just been added.
It'll be interesting to see what adjustments will come once the NPD figures come out soon.

These datas show that for 2019 the Switch is exploding only in Japan (+45-50%) and just having a noticable increase on other regions...I wonder if European and RotW numbers are not dramaticaly undertracked.

It makes sense that Japan is experiencing the biggest growth YoY. Seeing as how we're fresh off Let's Go and Smash Bros. in the holiday season + the lineup Nintendo has planned for 2019 is more focused on the Japanese market than the Western market. Yokai Watch 4, Super Mario Maker 2, Fire Emblem: Three Houses, Dragon Quest XI, Pokemon Sword/Shield, and Animal Crossing are all going to have notable hardware boosts in Japan, especially the latter 2. 

As for the rest of the markets, NPD will show us just how much it is growing in the U.S. in a few days. Europe and the Rest of the World is the big question mar for sure. And since we don't have any consistent data figures like we do for the U.S. and Japan, we'll likely be stuck waiting for Nintendo to release their final figures for the Fiscal Year themselves at the end of April.