Development boards are up on the site.
I walked up and read it: it says 277 m to the top of the mechanical penthouse. The design looked a lot like the Hariri Pontarini design we've seen.
uhh... that hariri pontarini concept is for the cumberland parking garage across from the new four seasons. look at the buildings beside it, and the shape of the lot. matches perfectly for there. that is NOT a preliminary render for 50 bloor west.
and the render is looking south, almost like it was taken half way up the shorter four seasons building. this explains the CN tower in the background.