I had another thought regarding this... While I can't consider myself the target audience for this type of product, I can see the neatness in the sense that whether or not you access it by 2D or by 3D, the data of the site is not doubled, making it sensibly efficient, not an "either/or" alternative but a "this/and" possibility. If 2D ever goes out of style for viewing, it wont be any fuss to "upgrade" or "downgrade" as desired.