I found this reference to Opera Unite (http://dev.opera.com/articles/view/an-introduction-to-opera-unite/)being called “Web 5.0“   The quote is from SFGate (http://www.sfgate.com) from Opera CEO Jon von Tetzchner.  Released on 06/16/09  (http://labs.opera.com)  Opera Unite allows you to set up a mini-web server right from your personal computer, to host pages, share files,  chat, and more.

Of course this brings a couple of questions to mind…
Barely a couple of years into Web 2.0  (http://en.wikipedia.org/wiki/Web_2.0) which has even been proclaimed dead (http://www.techcrunch.com/2009/02/14/the-death-of-web-20/) by lots of folks,   did we ever define  Web 3.0, and 4.0 ??  A lot of people call virtual worlds Web 3.0, but  others have posited different definitions, such as:

“Web 1.0 was primarily a publishing and transactional environment. Web 2.0 as a space where users co-create value. Web 3.0 as a semantic space where machine intelligence combines with human intelligence to create new insights. Web 4.0 as a mobile space where users and real and virtual objects are integrated together to create value. Web 5.0 a sensory emotive space where we are able to move the web from an emotionally flat environment to a space of rich interactions.”  Via  (http://www.emeraldinsight.com/Insight)

and “Web 5.0 will scoop up all this new knowledge and the intelligence  offered by Webs 2.0, 3.0 and 4.0 and deliver it in an ethical, self-aware and sentient framework, embedding all biological and artificial life within a global cooperative intelligence.”   Via (http://www.australia.to/index.php?option=com_content&view=article&id=4940:future-of-the-web-will-web-50-take-control-&catid=92:david-tow&Itemid=122)

What if…. you can host a virtual world from your personal computer with this degree of simplicity?