Glass has awesome strength, but the kind of glass that can be used structurally is phenominally expensive.
Composites that can be utilized for actually building large scale structures are also phenominally expensive. You are seeing them in airplane construction predominantly right now. Hunt down the Extreme Engineering or Build It Bigger or whatever it was at the time about the new Airbus plane. You'll see why it's difficult to build a building out of that stuff right now. A robot pretty much put all that composite together in a controlled environment.
Where we are seeing a lot of application structurally is in the retrofits of bridges and other concrete structures, with products such as Fibrwrap by Fyfe Co:
http://www.fyfeco.com/
This stuff simply gets glued to and wraps around beams and columns. It has the capacity if designed correctly to increase capacity by 40% and is phenomenally cheap compared to what you'd have to do with steel members to increase capacity similarly.