Lol. Took 6 replies for someone to actually answer the question in the OP -_-
Anyway, I kind of feel like I can't reply because you say "wealthy Vita owners", which I don't especially fulfill, but I'll give it a shot anyway.
I'm cautious about 3DS. After I got my Vita, it became my main mode of gaming. I loved being able to play everywhere; to shut down the console with the press of a button and then being able to resume later at exactly the same point I was at. And I loved that - to me - it's console quality on the go. Minus R2 & L2, the controls are there and the games are of very high quality.
This led me to believe that I'm just a fan of handheld gaming in general (I haven't owned a handheld console since the Gameboy Colour - I've always preferred home consoles). So I bought myself a PSP.
Holy shit, I really don't like it. It's just a rubbish piece of hardware. UMD's are noisy and annoying. The analogue nub is absolutely terrible. The screen isn't great. The OS is slow as fuck. etc.
So, now that's made me cautious about whether I'll actually like the 3DS as a machine. I know that it doesn't have the UMD problem, but I suspect it may suffer from some of the other things that I don't like about my PSP.
However, I suspect that in the future I will end up buying a 3DS. It's reaching the threshold of number of games that'd make it a worthwhile purchase regardless - but I must stress, only just. Heading into 2014 I think it'll start getting better as things like Bravely Default hit that appeal to me a lot more. It does, however, have the whole DS library too, which is a nice selling point.
I'm sure I'll be told by multiple 3DS owners that I simply must play Luigi's Mansion and Mario & Luigi and all the 3D remakes, but honestly, none of those series appealed to me when I owned their respective other consoles and that's not gonna change on the 3DS. Things I am interested in include Fire Emblem; Sims Pets; Ridge Racer; Tekken; Kingdom Hearts & possibly Mario Kart. Those are the games I'll be buying for eventually.
Other things that could speed up my 3DS purchase include:
- More JRPG's. Bravely Default next year is a great start to compliment Kingdom Hearts. More please.
- More racing games. I discovered, after WipEout 2048 & Need for Speed: Most Wanted, that racing games are a very good fit on handhelds. Having more than just Ridge Racer will help.
- Further price drop. I'm possibly just being greedy here, but the thought of paying £10 less for a 3DS XL and no games than I paid a year ago for a Vita + 1 game + memory card puts me off a little, and makes me want to wait.
- Better "classics" library. Are N64 games playable on 3DS yet? That'd be a big plus for me.
- Account system. I'd still be iffy about any digital content without it.
Final thing: A lot of my purchase depends on other consoles too. Right now, I'm happy to wait on a 3DS because I have loads of stuff to catch up on between PS3; Vita & PC. Should Sony suddenly announce an avalanche of stuff for PS4 that makes me want to buy that instead (so far, they've only got InFAMOUS), then that might shoot up my priority list. Same with Wii-U - if Nintendo announce stuff to compliment Pikmin & LEGO City, then I might favour that over a 3DS.