Photosynth is a service of Bing Maps. (I do see that your panorama is on Bing Maps.)
Perhaps because of Bing and Google's rivalry, Google has not taken any steps to pulling any panoramas or photosynths from Photosynth into Google Maps|Earth and neither has Photosynth taken any steps to publish themselves into Google Earth as a layer.
I am not aware of any reason why a third party couldn't create a Photosynth layer in Google Earth for any geo-tagged and geo-aligned synths and panos, but none have yet. In all likelihood it will be a third party if it ever happens.
From watching what Bing Maps is busy gathering with their Global Ortho Project, Streetside, Bird's Eye View images, etc. and their preliminary showings of their Read/Write World project, I know that 3D is very important to Bing Maps' future, but due to technology shifts in the web industry Bing Maps of 2010 - 2012 is not as rich 3D-wise as they were from 2005 - 2010 as Virtual Earth.