It's a valid point, to which I can only point to the North American branch of Hudson apparently abandoning their Virtual Console support in favor of pushing their WiiWare releases. This leaves a lot of titles, like Dracula X: Rondo Of Blood, in limbo, not to mention titles that are unlikely to see a Virtual Console release, like the Valis games.
But, that's really the only point I can make, since it's pretty obvious that the following for PC Engine games here is very niche, and it's likely that most people are playing ROM versions of SuperCD discs on their computers through emulators. I can't make a convincing case, other than my personal desire, that a clone PC Engine disc system would be in much demand here.