I highly doubt Nintendo even bothered requesting Fallout 4 since it will have been out for a year and a half by the time the Switch hits.  Skyrim Special Edition also has the advantage of being a remaster that most will be playing to revisit the game.  Since they have already played it once, thereare some, potentially many, who would find a more convenient means of playing it quite appealing since they won't necessarily feel the need to have a more focused, immersed setting since the Skyrim world is already very familiar to them.  

The systme is absolutely not less powerful than the Wii U.  The Zelda and Mario games we saw are games that are almost certainly running on the hardware.  And Breath of the Wild has enhanced lighting, shadows, better AA, and higher quality textures especially with LOD.  And the Mario game had some really excellent lighting, great textures and effects, looks pretty impressive.  

We don't know just how much more powerful than the Wii U it is.  If it is using a Tegra 1 that's been modified up the ass, it would be a marked improvement but less than the One by a marked degree as well.  If it uses a heavily customized Tegra 2, it could get within porting distance of the One, depending.  If it is using essentially a whole new Tegra developed just for it, that would be your best case scenario.  We won't know any of this for a while though.  But it is more powerful than the Wii U. 

NWPlayer123, who's known for hacking the Wii U, especially with Splatoon, reported that the trailer was running at 24 FPS. So the games that were running (supposedly) were not exactly running as they might actually run at. While this has nothing to do with the topic or about the details of the console, its a little tidbit. So those who might worry about Zelda not running well can be a little more assured.

Apparently the trailer is also at 24FPS, not exactly a representation either pic.twitter.com/Tg68qFQQeX

— I'm at @NWPlayer123 (@ArtemisialMoon) October 21, 2016

From the sound of the nVidia release it probally is a whole new custom Tegra chip that may be based on the Tegra 2, I don't see a reason why they would base a custom chip off of an older chip, especially one as old as the X1. And from the sounds of this they pulled all the bells and wistles for Nintendo making a powerful chip: custom physics, custom APIs and other tools

That's my feeling, it is like a Tegra X2.5.  Or X2S, if you will.And I could absolutely see Nvidia cutting a sweet deal with Nintendo because 1) Tegra has had a rough time and 2) the Switch would be fabulous PR for the Tegra line.

Also, I would find it hard to believe that Nintendo spent the money to work with Nvidia to get performance they could get elsewhere cheaper.  If you are going to work with Nvidia, you might as well take advantage of their tech and skillset.

I believe Fallout 4 with the big DLC incoming is more interesting than Skyrim (without mods?) for a decent amount of people, I think they really aren't sure to port that more demanding game to the Switch.

Thank you for your explanation, I will now change my expectations a little but I am still not sold on this, I mean october next year for example we will be able to tell clearly if it gets multiplatform games and with the same frequency the concurrent systems get them, I really am skeptical on this (maybe because Nintendo is willing this too, to appeal to a different audience and get different games).

I still don't get what people expect, since Nvidia makes powerful hardare too, this mobile solution is obviosly much much much weaker to the other processors they produce, I think sometimes people believe the PR guys. (then why buy an Nvidia video card that consumes a lot of Watts and needs a big heatsink when they could sell you mobile Nvidia solutions for gaming for much less?) <-- this is just me joking about console manifacturers false claims all the time (nobody is innocent).

Have a nice day.

Well the thing to remember is the PS4 and Xbone are using fairly old tech and even some mobile tech as well.  And the big question is can the Switch pull out the power out of its Tegra?  Cause there are a lot of factors to that.  A major one is cooling.  The big reason tablets with these powerful chips still can't keep up with laptops with old chips is simply that they are unable to run them full steam because they are so inefficiently cooled and thus can't be allowed to run full steam.  The Switch has some kind of cooling, so how strong that cooling is could effect the capabilities of the chip in practice.  

Nvidia is usually pretty straight forward, though real world performance is again a question because of cooling and other factors.  It will be interesting to see.  And multiplat support will also be interesting.  Bethesda being willing to play ball at all is a very good sign.  As we saw with the Wii and Wii U, they don't commit easily like Ubi and EA do.  

Got to wonder for those local player games like split screen mario kart, instead of detaching controllers, is it feasible to simply play across from each other (both people would hold up the system).

that reminds me of a mini game in little big planet ps vita, that was awkward but funny if the match was fast.

Would depend on the game and what it is programed to do. It seemed that you could do single system multiplayer in Splatoon but they had two players per screen in the NBA game and Kart. So it just depends on what the developers allow you to do.

So Skyrim that was present in the advert IS NOT CONFIRMED for Switch.
I'm guessing REGULAR multiplatform games from bethesda are out of the question?
Maybe they will come out with exclusive titles that works in the Switch?