Not tabletops. 2d, turn-based RPGs. Like Fallout, the example I used, which was NEVER a tabletop game. (Seriously, how could you get that screwed up?)
i doubt those other fans would (only) buy your game "because it is a table-top game made into a computergame"
If there was a dying genre I liked, and I saw a game in that genre that looked good once inspected, damn right I'd buy it for that alone. If you want to play a specific kind of game nobody makes anymore, then you'll play any you find that are any good at all. And what makes you think that's the only reason? There's plenty of new features here, and the soundtrack can't hurt.
This is a genre that pretty much doesn't exist anymore, but used to be much bigger. There should be plenty of fans of the genre who can't find any others. All I don't know is how many there are, how many of them can find my game and how many other people would buy it. (I'm also not sure about pricing, but that's beside the point.)