New elements and other "major updates" to be added to this version
Steins;Gate Elite was revealed as a "majorly updated" version of the original Steins;Gate visual novel back in May, and now we have a little more info on the release. It really is just a little more info, too, because we still don't know all the details regarding new elements the Elite version will introduce.
For now, we'll have to settle for a release window. Steins;Gate Elite is currently set for a spring 2018 launch on PlayStation 4 and PS Vita in Japan.