Thanks to SketchUp Materials Library for this notice here
“Yesterday (August 6), Google announced that user generated 3D content for the official 3D Layer of Google Earth will soon (with October 1) be over. With this move, an era of over seven years will be over. Google acquired SketchUp in 2006 and immediately released a free version of the software in order to encourage modellers to populate Google Earth with 3D content. Later Building Maker was also added (this was stopped in June this year) and eventually 45 Degree 3D Imagery was also added – this latter one to finally replace 3D models made in either SketchUp or Building Maker.”
We have yet to work out the implications for existing user-generated 3D models, importing, viewing and visualising.