there will be an improvement on the 3ds in some way, some time down the road.
anything nintendo says otherwise is BS.
Why does there have to be? Sure, they do have a record of making revisions to their handhelds, but unlike other companies, they rarely make revisions to their home consoles. Also, all of their handheld system revisions have had obvious reasons behind their creation:
Game Boy revisions
Game Boy Pocket: Slimming down the giant Game Boy
Game Boy Light: Addition of a backlit screen for better viewing
Game Boy Color revisions
Owait, there are none!
Game Boy Advance revisions
Game Boy Advance SP: Return of the backlit screen, slimming the system down more
Game Boy micro: Even more slimming down!
Nintendo DS revisions
Nintendo DS Lite: Slimming the somewhat bulky Nintendo DS down and making the screen brighter
Nintendo DSi: Providing more functionality to the system, with cameras, DSiWare, SD card support, etc.
Nintendo DSi XL: Bigger screens for better viewing, more room for input
Now, at this stage, what possible reasons would Nintendo have to make a revision of the 3DS? It's already small and compact, has bright backlit screens, and has a plethora of features... There's not really any kind of revision that I can even imagine. Nintendo wasn't lying when they said that they really packed this system full this time and therefore have no plans for a revision, at least at this point in time. I can see the possibility of a 3DS XL being made, but even that seems unlikely, because it completely goes against the entire nature of the 3DS.
Nintendo made the 3DS so small because they want people to carry it around with them everywhere, unlocking and sharing new content from other 3DS users and wireless hotspots. The size of the system, the built in Activity Log and Play Coins system, and SpotPass and StreetPass features are all part of Nintendo's effort to push mobility and connectivity with the 3DS. If you make the system much bigger, less people will be willing to carry it around with them, thereby defeating this purpose. Don't get me wrong, I would love to see a 3DS XL, and I'd take it everywhere I go regardless, but I don't think it's a very likely possibility.