The PS4 could have been stronger.  It's not impossible for Sony to put more hardware upgrades into the system, but they decided against it in the interest of maintaining lower manufacturing costs and lower sale price.  To think that the PS4 COULDN'T have been better is ignorant at best.  

The handheld revisions ARE in order to get more people to buy the system, including those who will rebuy.  HOWEVER, claiming they could have done it from the beginning and saying they didn't IN ORDER to do this kind of shows that you don't understand how the decisions are made for hardware.  If you want to talk about why the 3DS only had one analog stick, look at the size of the original 3DS.  Some can argue that you could have fit another on there, or made it into the c-stick it is now, but there are quite a few complications that go along with that.  Ergonomics is likely the main reason for not implementing one.  The New 3DS is slightly larger than the regular 3DS by the way (possibly due to the addition of the c-stick). 
As technology gets better and cheaper, new possibilties come up.  That's where the revisions come in.

You misunderstood what I meant regarding the ps4. Of course it could have been better but I highly doubt there will be a NPS4 that has certain games exclusive to just it.  Seems like they did that to increase the number of rebuys.  

That's because it doesn't really work for home consoles, as the past has shown us.   Handhelds are a little different, since they are cheaper than home consoles, and they tend to experience more abuse due to the fact that the entire system gets handled physically much more than home consoles do.  It's only natural that people are more inclined to replacing technology that physically gets used more than one that sits around (PC vs smart phone/laptop/tablet).  

Plus, the N3DS only has one exclusive announced for it and it's not even out yet... and the exclusive is a port.  The N3DS also runs the same OS as the regular 3DS, and is essentially the same architecture, except with several beefed up parts.

i guess the one thing we can take from this is the number of unique owners of handhelds is a lot less than consoles. It would also explain why handhelds sell way less softare than home consoles. 

Sorry, that was boneheaded of me. I never meant to write all future releases would be unplayable. So your correction is appropriate.

No worries, lol. I was very confused and just wanted to make sure you knew that wasn't the case.

I'm inclined to believe that those numbers are misleading.  All those different models you're seeing are most likely updates to the hardware to make failure and overheating less likely to happen, but not actual upgrades to the hardware's power.  Maybe a few ports will appear here and there, or the size may change... but Kerotan was mostly referring to the 3DS vs the N3DS, which is a bit different.  

Programmed Obsolescence at play... launch a system, then make it bigger, then bigger, then more powerfull... Have some fools buy all of them. While they could at least already launched it the bigger possible.

I think the 3DS userbase is a lot smaller than 50 million, considering all the people who keep buying different editions of the same handheld. I guess its something like 18 million.

Nintendo doesn't care