I mean, that same user posted this directly prior;

'I'm hoping they go back to the glory days. A power house , ps5 pro specs, and huge 3rd party multiplat support.'

So I'd say there's a solid chance that he's posting tongue in cheek...

Even if we take it seriously, like Vodacixi pointed out, 'similar' does not mean 'equivalent'. And he's talking about the demo, not the systems. Could a lower-res, lower fps version of the demo be classed as 'similar', I'd suggest so, though you'd have to clarify with that user if that's what he meant.

Bottom line is that you have to do some serious contortions to interpret that comment seriously as S2 = PS5.

It's this type of straw-manning that ends up with these threads turning into 30 page bickers.

I guess battery technology has to have improved as well in 7 years?

Looking at the Galaxy S series phones (not sure if best product for comparison...), but the S23 sports a 3900 mAh battery, compared to it's 7 year older sibling's, (S7) 3000 mAh.

So a 30% increase. If that improvement applies to Switch's battery type then the extra capacity could potentially be used to drive a higher wattage for similar battery life to S1 - though my intuition tells me Nintendo would more readily opt for longer battery life...

The Switch OLED (420 grams with Joy-Cons) has a 16 Wh battery.

The similar sized Ayaneo Air Pro (440 grams) has a 38 Wh battery.

The Steam Deck has a 5300 MAH battery versus the projection of a 5600 MAH battery given that speculated 30% increase over the original Switch. So doesn't sound too far fetched. 

Please use Wh (watt hours) instead of Ah (ampere hours) for battery capacity comparisons.

Ampere hours are depending on the voltage of the devices.

Switch and Steam deck have different voltages, Switch 2 will probably also have different voltages.

Watt hours are a unit of energy that represents the capacity of power (in watts) to be expended over a period of one hour.

In contrast, amp hours measure the current (in amps) over a period of time.

^^ the voltage is always about the same for lithium-ion batteries, the Steam Deck likely uses two cells in a serial circuit instead of a regulator since it's exactly twice 3.6-4 V. So it's better thought of as an ~ 11,000 mAh battery when comparing it to smartphones/Switch.

Mind that's easier for batteries to supply constant current rather than a constant voltage at all charge levels, hence why it's measured in mAh.

It's more a matter of size. The S23 has a 77% larger surface area than a 5.1'' S7 so the battery could be even bigger, like the M54's 6000 mAh.

That’s exactly what happens in like every Switch 2 hardware thread, a bunch of people arguing over semantics.

Person A: Switch 2 will be similar to current gen consoles as it will likely run most 3rd party titles just by lowering things like resolution, frame rate, lighting, particle effects, etc.

Person B: Switch 2 will not be similar to current gen consoles as 3rd party developers will have to make cuts to things like resolution, frame rate, lighting, particle effects, etc.

I think a lot depends on if Alan wake 2 will be a one off or the norm.  On the ps5 performance mode it has native resolution less than 900p.  DLSS is nice but will not work well if upscaling a 540p S2 image.  

Just my 2 cents but the first few years were heavy in cross gen ports.  Now that is over I think people are going to be surprised at graphic fidelity.  I don't think we hit diminishing returns and I think the gap will be quite large.

Having said that Nintendo is my favorite developer and the S2 for nintendo's art style will look amazing.  

I'm just not buying the switch 2 will pull off GTA6 and AW2 in likeness.  

The big advantage for the switch 2 is upscaling....  I think current consoles will start using upscaling regularly.....  with a push in raw graphics.  PC has been all over this for a while.  Meaning I don't think it will be the advantage many think it will be.

Even if the Steam deck runs PS4 games, usually they need to be upscaled vs the PS4.
Like say God of War, on a steamdeck you would run that at 720p (low) with FSR (fps would be 28-33fps, but usually above 30fps).
While on a PS4, it would be 1080p native (slightly better settings), and a solid 30fps.

Steamdeck isnt quite as powerfull as a PS4.
One of those things that high resolutions enjoy alot, is the memory bandwidth of vram.
Steam deck has 88 GB/s compaired to the PS4's 176 GB/s.

The steam deck is close, but not quite there imo.
(steam deck, while gameing can go upto like 27-28watts or so (with the display at 600nits ect))

Steam deck shows its possible though.... Like I could see Nintendo doing it, matching a PS4 (without upscaleing) in terms of performance/visuals.
And with upscaleing (when docked) reaching better image quality than a PS4.

*edit:
Oled version of steam deck,.... with the faster ram it has (memory bandwidth 102,4 GB/s), and newer node for the chip, lowering its wattage by a few watts under load (compaired to the original)... again is makeing me abit more optimistic about the Switch 2.

Here are the batteries of the Switch and the Steam Deck (LCD):

The battery of the Steam Deck can hold more than double of the energy, but is of course approximately double the size and double the weight.