Switch 2 I expect something like:
Tablet of slightly small size(width/length), but thicker(gameboy or folded 3DS are still good tickness). Larger screen due less bezels. With a SSD, and a power of something between PS4 and xbox lockhart.
2 models of joycon. One smaller, not meant to be played separately.
Other bigger and foldable. When closed is like a half xbox controller and can be atached to switch side. when opened, the handle become 2 handles, for a more confortable play.
2 kinds of dock. A small and simple that just mirrors the switch 2 image, other with processing to upscale the received image(with DLSS, a post rendering method).
VR googles, where you just plug the switch 2 to the googles.

And will be sold in different packages.
-Portable:tablet, small joycon and charger.
-Simple: tablet, small joycons, charger and mini dock.
-Standard: tablet, joycon pro, charger, mini dock.
-VR: tablet, joycon pro, charger, mini dock, VR googles
-Pro: tablet, joycon pro, charger, DLSS dock, VR googles

Starting from a fairly cheap portable. If you want to upgrade, just buy the accessories.

Charging pad would be cool, the only thing I'd worry about is the cooling. The dock allows the switch to have some air on the front and the back of it, I dunno if it'd get too hot laying on something while the system is going full bore. But yeah in general a HDMI receiver and a charging pad would be very cool. Then you'd never have to plug anything into the system.

Meanwhile, I'm gonna hope for wireless charging two gens from now in like ten years.

That would annoy the heck of most other people if some randoms take over the screen in a coffee shop or other public places.

Also wireless streaming from mobile devices to TVs ain't something new.

1) You would obviously have to have a place's permission to do it.

2) I'm talking lag free streaming. 

3) The bigger part of the stream would be that it will display the game better, visually, on the screen you are streaming to than it can on its own screen (if said screen is better). The idea here being the device is actually more powerful than you think but because of a cheaper/more affordable screen you can't tell until you stream to a TV, without needing some bulky dock with cables.

Tegra is the name for a "product skew". - Not the actual chip code name.

You can have an Ampere based Tegra chip... Which is actually happening with Tegra Orin, it will be available next year... And we have known about it for the last several years.

Tegra Volta is likely to match the Playstation 4 in many tasks.

I think due to fillrate limitations of mobile chips we will see the Switch 2 top out at around 1080P, which is fine, it's mobile and will look crisp... It's when you blow it up on a giant display that the limitations seem more pronounced.

Ray Tracing due to the fact it uses dedicated compute cores might be out of the realm of mobile devices due to the substantial additional power requirements required.

I mean in 2-3 years something like Xavier or better could be there and it has tensor cores now. Something similar can be shrunken down in 2-3 years when it's time for a successor right?

The successor to the Switch's Maxwell based Tegra already exists... The Switch's Tegra SoC was already several years old when the Switch released.

Essentially you have Tegra Kepler (Aka Tegra K1) >>> Tegra Maxwell (Aka Tegra X1 Aka Nintendo Switch) >>> Tegra Pascal (Aka Tegra X2 50% more performance at the same TDP) >>> Tegra Volta (Aka Tegra Xavier) >>> Tegra Ampere (Aka Tegra Orin).

Each line of Tegra basically uses the desktop PC GPU architecture with a few efficiency changes I.E. Maxwell, Pascal, Volta and Ampere but couples that with a cluster of ARM cores like A57 or Denver.

Basically there are chips which Nintendo could use as a generational successor to the Switch's current Maxwell chip, today.

In saying that, the longer we wait, the faster and more capable the ARM SoC's become, it's a fast moving industry on a 9-12 month cadence.

It wasn't several years old. X1 was only 2 years old when Switch released. I believe Switch 2 will use something custom based on Amphere or later.

Nintendo Switch released on March the 3rd 2017.
Tegra X1 released on January the 4th 2015.

That is 2 years, 2 months.

By "several" that means more than 1.

2 years is a VERY long time in the Arm SoC space.

The Wii U was a bit different than the Wii, while it took the branding, it differed in the following ways:

* 4 Wiimote local multiplayer focus replaced with 1 big Gamepad.
* Asymmetrical gameplay instead of symmetrical gameplay.
* No major first party games until the very last game.
* No big releases for motion gaming (Just Dance on Wii U was the inferior B-version; while it was virtually the same game, the Wii version could be played on every Wii and Wii U, while the Wii U version was only playable on Wii U).
* The on screen gaming was another flawed concept because it divided the attention, it was intrusive to switch between Gamepad screen and TV. This is the opposite of Wii which probably had the least intrusive interface a console has ever had as the interface added rather than divided.
* Most importantly, Wii U tried to focus back status quo, while Wii was an art-house gaming revolution. It successfully challenged the status quo of Hot New Game = Same-old formula + upgraded graphics and sold nearly 1 billion pieces of software and over 100 million hardware units. While pretentious people trying to be gaming snobs (pathetic, I know) try to deride them as shovelware, the Wii game lineup proved to be a winner, as it went through the hottest period of any console in history - the "Wiimania" period where Wii was constantly sold out and selling for 600-800USD on ebay, regularly. The 2008 calendar year sales of 26 million still mark, BY FAR, the best sales a home console has ever had in a single year - to put this into perspective, that's almost double the Wii U lifetime sales. While the Wii U bought vanilla third party multiplat experiences (You know, the Ubisoft, EA, Activision type of games with lots of flash and no soul), the Wii brought exotic seeming new versions of games upgraded with IR or accelerometer controls which often improved the game into a fresh feeling experience (Tiger Woods, Scarface, Resident Evil 4, and Godfather felt like HUGE upgrades over older versions thanks to IR controls, I think the old GTA games would have been great on Wii).

Aside from that, Wii had a multitude of fresh new art-house style games like Cave Story, Wii Sports, Wii Fit, Endless Ocean, Little King Story, My Life as a King, Just Dance, Trauma Center, Anno, A Boy and his Blob. While Wii U had a few of these, like Trine 2, it wasn't much more than the average console, and they never felt a major part of the console's DNA like they did on Wii (and DS, and do on Switch); people often deride these as "shovelware" but these sorts of games are where creativity and innovation happens.

Sorry, I know I got a bit ranty (I tend to devolve into that).