I think it's meant to be a standard client browser API that allows any program on the computer to interact with it [0]?<p>[0] <a href="http://dvcs.w3.org/hg/webdriver/raw-file/515b648d58ff/webdriver-spec.html" rel="nofollow">http://dvcs.w3.org/hg/webdriver/raw-file/515b648d58ff/webdri...</a>