Until Google releases a desktop version of
Google Goggles, you can see your previous visual queries at
http://www.google.com/goggles/history even when you don't have your phone with you. Click on one of the images and you'll see the results, similar images and links to related web pages.

It's surprising to see that this service is not yet integrated with
Google Web History and it's not part of Google Image Search.
{ spotted by
François Beaufort }