Nintendo Seal of Quality plastic.

What do u mean? U already said u bought a Switch in another post.

Yes, I bought a bunch of Nintendo Seal of Quality plastic.

Who knows. I don't even get why you would even want to have two, unless you really want to be able to hook it up to two tv's as easily as possible.

One of the sources is:

http://www.gamesindustry.biz/articles/2017-01-13-nintendo-sets-a-high-price-for-switch-peripherals

"Nintendo is also selling additional Nintendo Switch Docks, which charges the Switch tablet and connects it to a television. An extra Dock will cost $89.99, and the package will include an AC adapter and an HDMI cable."

https://gamerant.com/nintendo-switch-controller-price/undefined

" For an extra Nintendo Switch docking set, fans can expect to pay $89.99."

What is really inside the dock, we will know when we get our hands on it. But so far, I cannot see anything spectacular from the infos we have. So far, it is just a plain docking station, which provides power, and sends the picture via HDMI to TV.

The Handheld itself runs in a lower clockspeed and will increase it the moment it is plugged into the dock. I don't know if the clock speed will increase just by charging it, so I assume there is a small chip which tells the handheld that it is being plugged into a dockingstation.

It's a simple motherboard in a casing. It doesn't even have USB 3.0 or HDMI 2.0. So in what way could this device so expensive.

If it ups the resolution then clearly there's some tech in there. Whether it's worth $90 is another question.

I'm far, very far from being a hardware expert.

Peh has already answered where the 90 Dollars price comes from and the reason it runs the games at 1080p vs 720p while in handheld mode is not because the dock has extra hardware (as far as we know), but because the Switch will run at higher clocks when docked as it won't rely on the battery alone.

that still doesn't explain the 90 euros price tag...

It doesn't even have an ethernet poet :(