Its possible, whether or not NIntendo and/or the game developers allow it is another matter.

If the dock is essentialy the same with a regular charger how the Switch could identifiy the dock and differentiate it from other charger?

What?

who knows really, it's not completely off since its their patent afterall but yeah, the chances are low

as for whether it's technically possible I can't have an opinion since I don't have the slightest idea about the stuff

it wouldn't though. You can do this for laptop already as an example. With laptops gfx you play on med/high and with the box you play on max settings. 

the problem is whether Nintendo contemplated this from the beginning or not. If not tacking it on later will suck.

As others have said USB-C is also slow at 10GB/s. Although what would be interesting is if it is a thunderbolt 3 port. I know intel is using thunderbolt 3 as USB-C connectors to try and standardise. So it can run a USB-C device too. However, I doubt Nintendo were that forward thinking and are holding an ace up their sleeve.

no, to actually utilize additional compute power in the dock the Switch tablet would need a very very high bandwith connection, much higher than USB 3.0 or 3.1c can provide

if there is no such connection then I don't see the need for it to be a "Switch dock", as the dock would do the processing alone (= stand-alone console)

That's exactly what I mean by giving false hope. There's no way an USB - C will have enough bandwidth to have another processing unit feeding the console.

This is nothing new in the PC world, you can find plenty of such external graphics card solutions (for laptops mostly) with PCIE connections. The key word here is PCIE.

So before feeding a bs rumor that has no basis to even exist and tricking more people into believing it, a few minutes of research would clarify why it's not possible.

If the Switch was using thunderbolt 3 maybe things would be different

It needs a way to diferentiate it or the console couldn't "turn on" the processing for HDMI/USB/Bluetooth 4.1 and turn off the screen, the dock may have a small chip that does nothing more then identify that it is the dock. That is to prevent the screen from shuting off while you are charging it while you play.

I am amazed at how many people think it's actually possible in this thread alone.

USB 3.0 is good for 625MB/s of bandwidth. USB 3.1 doubles that... And that ignores the latency issue completely.

USB - C is not 10GB/s. It is 10Gb/s.
GB/s = GigaByte per second. Gb/s is Gigabit per second. There are 8 bits in a byte.

I will assume you are just confused over the terminology though and the differences GB/s, Gb/s, GiB/s have.

And that assumes Nintendo is even using USB 3.1. They could be using USB 3.0 which is half the bandwidth or USB 2.0 which is 1/10th the bandwidth of USB 3.0. (Thus 1/20th of USB 3.1.)

There is additional circuitry in the Dock, Nintendo is passing the video via the USB C connection rather than a HDMI port, so there would be a chip that handles the hand shaking and processing of the video and audio stream (Which is likely protected) so it can be sent over the HDMI cable. It's not "smart" by any regards though.

So, the handheld will probably still run as a handheld even if you stick a charger in, because there is no hand-shake with the docks chipset.

If you want something like that, you may as well ask for a tablet that streams from a really powerful Nintendo console on the go Vita-style.