BMW has announced they will launch the i8 roadster in 2018.
I can't wait to see one of these in person, and hopefully by 2018 I'll be in a position to purchase one! I almost pulled the trigger on an i8 last fall but we ended up selling and moving and that changed priorities for a while.
Harald Kruger(chairman of the Board of Management at BMW) said the i8 Roadster has been approved for production and will join the current i8 at the top of the brand. In the second half of 2016 the i3 will come with a 50% larger battery capacity, and then in 2018 the i8 Roadster.