With all the sales they're getting, I get the feeling BMW is just bringing new products just to see how they would fare and if it's deemed a failure, they're willing to accept it and move on. As for BMW answering a question no one has asked, I look at that as trying to stay ahead. Look at Apple and the iPad. How many editorials and columns did we read about how useless it would be if it was just a bigger iPhone? No one was really looking for a tablet but Apple makes one and now it's mainstream.
(Of course, it could just be BMW going crazy and there's no real reason to make these ugly GT's...)