I have to disagree with Patcher, actually. I own both consoles, so don't see me as a Sony Fanboy or anything... But the 3DS, in my opinion, is just the newest and flashiest Gameboy. They seem to throw a new (slightly different) console out each year (with the exception of the SP-DS jump), while Sony has just been riding off the same old stuff; until now.
The 3DS is just going to be a gimmick. I already see the same trend happening in the movie industry - people love watching 3D movies, sure, but only for so long! The novelty is gone after a few sittings... I feel it will be the same with gaming.
Besides that point, I think Sony will have see success due to the fact that they've waited so long to come out with something like the PSP2. The GO was a complete failure, which makes me think people are going to be more receptive towards the PSP2 - it's rumored specs are incredible, and as long as it's harder to crack than the PSP and DS, it will have a strong developer army. So long as they announce it soon (on the 27th hopefully), they shouldn't have a problem getting interest from those who don't already know of it.
Lastly, which I don't know for sure of course, the 3DS and the PSP2 might actually be a pretty close price margin to each other. I hope Sony's learned that you can't sell overpriced junk - yes, I'm looking at you GO - Sony will have to start low if they hope to ever rival Nintendo.
Here's hoping, Sony!