I didn't see the appeal of the original PSP, and I doubt I'll see the appeal of the new one. I don't have the money for a new system, hell, the 360 really set me back when I got it.
However, I abhor the original Xbox and later fell in love with the 360 (or rather many of it's games). so there's really no way to be certain. I've yet to think of the 3DS as worth the price. In fact, I'm pretty pissed at Nintendo for the horrible launch price, which my cousin actually paid, only to not have a 3DS specific game for it until the price-cut later on. Granted that was as much my cousin's fault for wanting one at launch, but the original price was still ludicrous.
Oh, and in case anyone was wondering, no, I didn't like the Xbox 360 right away, either. I didn't want until until around 2010 after playing my cousin's for most of that year, and picked up a Slim during Black Friday that year. So yeah, what I said about "maybe eventually wanting one" could still happen, but much like the PS3, Sony hasn't impressed me these past few years.