When do we see drop-doors on convertibles or roadsters?

Today, we found an interesting video shared somewhere at Facebook, that show a so called drop door modification to a sedan car. It was uploaded on youtube in 2007. The doors look pretty funny, but also make great sense for practical reasons (if safety standards can be met somehow).

We have seen Tesla and Mercedes use falcon wings before – who would dare introducing these type of doors? Naturally, at Toplift we would love to see it on a convertible or roadster, but that might be just too optimistic?