Something that doesn't look like a jagged and blurry mess on a 1080p display is actually a good start.
Personally, I'd rather play Wii level graphics games on a handheld as they will at least be sharp and well defined, even if being rendered at 640x480 or even the 400x240 of the 3DS.
The Wii itself looks best on an old SD/ED CRT. Not many people using those considering a 1080p display costs under $200 these days.









