New 3DS was a handheld, not a home console; so handling a Wii port is actually quite an accomplishment. And not just any game either, Xenoblade chronicles was the most impressive game on the Wii. The original 3DS was incapable of it.
Hmmm...the new 3DS was a handheld released late 2014 and mobile hardware had grown leaps and bounds beyond Wii which was already hugely outdated in 2006, and more closely resembled a 2001 Gamecube than anything else. Managing a downgraded wii port on a handheld in 2014 was not much of an accomplishment imo.
But the point is not to poop on the new 3DS. The OG 3DS was clearly geared as a PS2 tier system. The new 3DS just better realised this vision but not much more than that. As permalite said it's clearly of the same generation and marketed so. I was just saying this is what I meant when I said the improvement was small/incremental