To use your chromecast without a television? All you need is a mini LED projector with HDMI input (you can get it at US$60 or less), and a metal book stand (Yes, metal book stand, and this might be the best thing you ever do with a metal book stand, to stand a projector ^_^)
And enjoy your movie with 60″ screen on the ceiling 🙂
GGshow reloaded