Lol, I also thought the same thing when I first heard aboput pre-folds.

Then there are the "All-in-One's" with snap-in soaker pads (boosters) or pockets...

When you are referring to nappies that don't need folding, you might want to have a look at contour nappies. They are sort-of hourglass shaped, don't require folding, but also don't have elastic, velcro or snaps, so are longer-lasting and cheaper. They do up with either a Snappi, nappy Pin or are just held in place with a well-fitting cover.