The possible potential for searching for infomration based on imagery has been here since the iPhone app developed for SnapTell but the recent announcement of Google Goggles has a lot of possible implications for Steve In Action.
Developed for the Android mobile platform, this potentially offers an easy to use web search based on images captured on a mobile phone camera- specifically, one of their listed examples is to search for art.
This little video gives some ideas what Google has in mind for visual search:
Perhaps even the future for augmented reality might also provide a way to overlay Steve tags on a mobile camera view inside a museum??