All this talk about 3D

I've read and heard lots of discussion about the pros and cons of 3D in gaming, but one point that I believe will be one of the most important is also one that I haven't heard elsewhere. What will the effect of adding 3D to videogames do to development costs? Costs have already been climbing so fast and high that developers are going to have to hire company Sherpas. We are already seeing games like Mirror's Edge which sold something like 1.5 million copies and still weren't considered a financial success.

If developing for 3D adds to that I worry that we're going to wind up seeing a more extreme form of the current segregation between high profile games that have ultra-high budgets and tons of marketing that sell millions of copies. . . and everyone else.