Well I do a lot of custom vector graphics in AI. Say I drew up the Datsun logo in Illustrator and wanted to cut it out of a piece of stock. Right now my option is to save that logo as a jpeg, insert the image, and then either try the shitty autotrace mode or redraw over the lines to get a SW sketch.
I can never get autotrace to function properly and it never comes out the same if I have to redraw it. Plus I already drew it once... Why should I do it again. SW allows you to import AI files in and automatically turns them into SW sketches (at least that's how I'm reading it).
That's what I want to do.