Here is what the Rainier Square Tower in downtown Seattle looks like now. (See this post from November).
Amazon was to lease all 722,000 square feet (30 floors) in the new building, but announced last week that it would not do so anymore. It will look to sub-lease the space to other companies instead. This announcement came 10 months after Amazon had threatened to pull out of the building if the city were to impose a new business tax (which the city then backed away from).