To all the people bashing 3DS/ Vita in favor of iPad 3:
You forget history too quickly. Nintendo has absolutely no care for future-proofing their systems, handheld or otherwise. They make something relatively cheap with decent features, and it sells like hotcakes because of the first and third-party game lineup that they pump out. Same with Sony, though I'll concede, Sony makes a slightly bigger deal out of specs than Nintendo does. But regardless...
iPads don't have any buttons, or sticks, and they're big and heavy. It's not a proper portable console, and it has no need to be. It is designed for rich people like my dad who likes to buy toys and gadgets for it and check email on while sitting in a fancy hall waiting for a meeting with some other rich person.
My point is that specs really, really don't matter. As Nintendo and Sony have proven time and time again. It's all about what content you can get to be only available on your system that makes people want to buy it. So while comparing Vita or 3DS to an iPad makes for a fun tangent and semi-interesting conversation, just remember that in the grand scheme of things, like longevity and install base, it is completely and utterly irrelevant.
Just remember, the DS had N64 graphics. It sold over 150 million units in less than six years, and doubled the install base of the entire line of Game Boy models dating back to 1989.