I don't think that's quite the right approach.  The whole point of the live cd is that they can try out the whole enchilada and see if their hardware is supported by the distro, how the included apps work, etc.  The Windows versions provide a fallback position, for those not ready to jump in and install Linux... and a 'bridge':  A lot of people have more than one computer in their lives, say home and work, or his-n-hers laptops (and a desktop PC for the kids?).  Being able to install Open Office on the wife's laptop and my work PC off the same CD as the live demo is just too cool.