No, SD TV for the Wii is fine. It can only do a max of 480p anyway.
It's well worth going for component/VGA with the wii. It looks far better on my PC monitor than any SDTV I've seen.
I'd have thought that those will be output rather than input though.can i use vga on my laptop with it? on the back of my laptop is a DVI-D and a VGA. where can i get the lead from?