According to a news release about the address: "799 Broadway will feature floor-to-ceiling glass, private terraces, and 15 foot high ceilings. This combination of highly desirable location and state-of-the-art design will appeal to New York’s most progressive and creative companies."
No. 799 was the former home of the historic St. Denis building, which opened as a hotel in 1853. Normandy Real Estate Partners bought the property for somewhere in the $100 million ballpark back in 2016... and tore it all down.