I'm not going to pretend that I'm a massive tech head (I'm really not, hence why I'm here), but I have a hard time believing that NG Switch will be in the ballpark of Series S..... Let alone PS4 Pro or One X.
What would the battery life be like? How would they keep it cool? How would they keep the price down so it's a viable mass-market device?
I can just about believe that something around PS4 levels of power in your hand is achievable, with modern components, DLSS, slightly bumped performance when docked...... Anything else seems like a rather expensive pipe dream.
I just don't believe for one second that this new machine will hit the levels some are so staunchly believing it will. There is some level-headedness around here though, so that's reassuring if it turns out that it's running the Matrix demo with a few 'buts' and 'howevers'.
A 4K TV has 4x more pixels than the image the PS4 outputs. That image is "stretched" to fill the entire screen, this is called upscaling and usually looks quite blurry in comparison to 4K content.
Brute forcing native 4K would take 4x more power. PS5 is 5.5x more powerful than PS4, so PS4 Pro would be too expensive in 2017 and PS5 games would look almost the same as the PS4 aside from being less blurry if they went this way.
What Sony did for the PS4 Pro is essentially getting halfway to 4K by bruteforce and then doing a
better upscale to reach 4K. And while the new consoles have the power to bruteforce 4K, devs are also relying on better upscaling so that they can use the power bump to make games prettier instead.
And then Nvidia made DLSS 2.0, which completely outclasses the upscaling used by the PS4Pro and is still significantly ahead of what the new consoles have. It upscales all the way from 1080p to 4K with really good results, so the NG Switch docked should only need a bit more power than the PS4 to have non-blurry 4K output. And the same applies to handheld: they can make PS4 ports prettier but blurrier and then use DLSS to remove the blurriness.
The result is that games with DLSS are expected to look on par or better than PS4 versions, and that they won't look blurry in 4K TVs, which is the whole purpose of the PS4 Pro. And that's even if, in terms of raw GPU power, handheld is closer to XB1 than PS4 and docked is closer to PS4 than Pro.
And btw, there's more to consoles than GPU raw power and upscaling though. Series S is significantly more capable than the PS4 Pro, but instead of doing last gen version at higher resolution, devs chose to do new gen version at lower resolution (which is the purpose of the Series S, after all).