I'm neither an architect nor a designer, but my gut reaction is that you can only get so creative at 1,070′. Without any evidence to back this up, I'm going to say that physics will force most skyscraper designs to converge.
http://www.hearandplay.com/main/wp-content/uploads/2015/12/t...
https://i.ytimg.com/vi/zKV9lrNlb8M/maxresdefault.jpg
0: http://www.socketsite.com/archives/2007/09/pelli_clarke_pell...