The 3DS, like the DS and the Wii, is another piece of unambitious tech with a cheap gimmick tossed in that allows people to overvalue the hardware. The gimmick is the brilliant part because it allows them to get away with making obscene profit margins. I think Nintendo interprets these new machines as a major imposition, done only because they don't want to be completely lapped by the competition. If the PSP2 wasn't in the works, I doubt Nintendo would have even bothered with the 3DS - we would have seen the DS last until 2014, like the original Game Boy.
I thought the DS and Wii had substantial gimmicks, whatever that means, that gave them different appeal. DS had two screens with one being touch. There were a bunch of touch screen that couldn't be done on the PSP or any other console like Ouendan and Trauma Center; two screens were basically useless. The Wii had waggle and pointer controls, and the second was great and made games like Sin and Punishment, Boom Blox, and all those lightgun shooters work. Waggle was more hit or miss; marble saga that has you tilting the world is good, everything that just has a digital action associated with a motion is bad. These were games that weren't appearing on the other consoles (save for expensive peripherals). I probably wouldn't consider touch or pointer to be gimmicks, actually.
The problem with the 3DS is that it's backwards. The raison d'etre of the thing is visuals and it fails at that. It is dated before it is released on just about everything except the 3D screen. And you can argue about why 3D is great, and I admit that the concept is intriguing, but it ultimately isn't a worthwhile feature with this sort of execution.
Compare it to the PSP2. Dual analog, multi touch capacitive screen, back screen (
), all them gyros n' motion stuff, etc. on top of vastly superior visuals to anything else on the market. Far be it for me to claim something as fact, but I will anyway and say: it is a fact that video games will be better on the PSP2. People will think 3D makes the 3DS better. But deep down, as they struggle to play a 3D game with one analog stick, or hold the stylus in one hand to operate the touch screen, or enter numbers to play online, or spend $40 on a $2 iPhone app, there will be a tiny doubt that they're cheating themselves.
So, yeah. I have the 3DS preordered.