Bad ports (and the majoirty of DC games would inevitably not be as nice on Saturn) are not the way to keep a system alive; people would likely just prefer the original to a watered-down port. I think what Saturn really needs to keep it going is people who can write interesting programs for it, people who can engineer interesting hardware for it (and hopefully keep the system running) and people who enjoy using the resulting software and hardware.
By the way, Dreamcast is not a Windows platform, except in the sense that it can run a custom version of Windows CE that was not intended to be used for most games.