It's sad but true that most high-selling games have shinyness and only shinyness going for them. Tomb raider, for example, is not a particularly well written game. Really, its only well-drawn. As another example, take the old descent series. Descents 2-4 were Descent 1 with better graphics. It IS what sells, because people assume bad graphics means old means not much effort.
Of course that's just my oppinion, I could be wrong.
SFC3 still rules
Alexander