Yeah, Dolphin (and PJ64 and pretty much any emulator with hardware acceleration and polygonal graphics) pass the scene info and rendering data to the GPU and the GPU renders it all out at the specified resolution. Even the API used to pass the data to the GPU differs depending on the plugins, with OpenGL seeming to be the most common, DirectX next, and even Glide is used at times (well, in a GL wrapper, what with Glide starting as a subset anyways).
And we've explained why. The Wii's games are low-resolution, but the Wii U is rendering them at a high resolution, which isn't smoothing them like the Wii was (bilinear filtering, blurring, tomay-to, tomah-to)...I know what upscaling is....
the point is, it looked better on the same tv on the wii.
No, the Wii has no HD games because the Wii doesn't output in HD.The metroid prime trilogy is a HD game (at least nr 3).
I'll run it trough the wii today and see how it looked there.