With the Tegra TX2 chip available, a hardware revision is almost guaranteed, especially since it can double the battery time or enable smaller form factors. And the market demands a smaller, 3DS XL sized miniature version of the switch.

Consoles will see more and revisions, and the trend is already quite clear. So, the opposite of what OP is claiming will hold true. There will be lots and lots of revisions, especially if they want to keep selling the thing for a few years.

I can see this prediction easily coming true tbh I can see a mini version being possible though.

Yup, actually Switch like hybrid gave much more opportunities for different type revisions than any other Nintendo hardware, especially with strong point that Switch will be only Nintendo platform and where they stop to divide they resources on separate home console and separate handheld platforms.

Revisions/variations are not made just because there some flaws with current models, they are also made to offer to market different price points of platform for users with difrent needs. Do you really think 3DS had so many flaws that needed 6 revisions (including 2DS) to fix them, or that Sony relased PS4 Pro beacuse regular PS4 has some flaws!?

Actually revisions could become more frequent with Switch because with fact that Switch is hybrid there too many opportunities of different types of Switch hardware and price points.

Switch is 28nm and there is already 20nm Nvidia chip that gives better battery life and less heat. Switch doesn't need to be bigger, but always is nice to have more variations of hardware (look at 3DS). Nintendo already released 2DS like part of 3DS family, that tells us that Nintendo does not fear to make different versions of console.

Just look at 3DS and how many hardware variations it had.
Nintendo will 100% do hardware variations with the Switch too.

The Switch uses 20nm technology ... 

And the Switch arguably has less paths to choose from than the other Nintendo handhelds before once we factor in the things I mentioned ... (the only reasonable aspect of releasing non-portable SKU is to get a potentially lower price)

The Switch TV already exists, it is called the Nvidia Shield TV.

"It will become important for us to accurately take advantage of what we have done with the Wii U architecture,”
“It of course does not mean that we are going to use exactly the same architecture as Wii U, but we are going to create a system that can absorb the Wii U architecture adequately. When this happens, home consoles and handheld devices will no longer be completely different, and they will become like brothers in a family of systems"

Iwata, 2014.

Yes, my bad, Switch is using 20nm and there is already 16nm Nvidia Tegra chip...rest of my post.

Switch Mini/Pocket is almost certain thing, bigger Switch with 1080p screen that will have same performance in handheld mode like currently has in docked mode is also possible with new Tegra, maybe we could have even Switch just for home TV use but for that chances are definitely much smaller than for Switch Mini/Pocket just for handheld play. Its not point only about lower price point, but about difrent price points and difrent type of revisions that suits difrent neeed of consumers, look at 3DS, you have price point from $80 to $200,from 2DS that isn't clamshell form factor and dont have 3D to New 3DS XL.

16nm doesn't have any density improvements compared to 20nm ...