It doesn't mean anything for Chicago. "NYSE Chicago" is an electronic exchange hosted in New Jersey. It has Chicago in the name because NYSE bought the old Chicago Stock Exchange in 2018 (which was partially hosted in Chicago and partially in NJ... it was weird). To my knowledge post-2018 NYSE Chicago never had any trading operations in Chicago. NYSE does have sales people in Chicago because of the large prop trading community in the city and it would be hard to see how this NYSE Texas situation changes that.