It's an apples and oranges comparison: while the N3DS might be more powerful than the Wii, it's also outputting only 60% as many pixels as the Wii was: 800x240 (and that's if you're playing in 3D) vs. 640x480.
I started the game on the og XL and since yesterday I moved everything to the N3DS and the difference is really big, like for real, the texture upgrade is fantastic.
Mario Galaxy's backgrounds are just space, so I don't see why this couldn't be brought to 3DS with some model changes/textures. If Xenoblade can run on it, I think Galaxy can.
Xenoblade will be a more proper test, MH4 IS pretty close given how iterative the series is but I can't help they could sneak away cutting some corners here or there that might be harder to hide in a straighter port.
Yup, the new one. Happened on several occasions while slicing away on Zamtrios, specifically. It's not a big deal, but it's noticeable since it can affect your input timing.