The Dassault nEUROn is an experimental Unmanned Combat Air Vehicle (UCAV) being developed with international cooperation, led by the French company Dassault Aviation.
I doubt this is the real one. If you read the wiki article they are only building one and it won't fly until 2012. Companies like this don't take their single prototype and put it on a street corner.
Its a mockup. Black full-size mockup that was displayed several times during airshows such as Le Bourget. The real prototype is more detailed and in gray color.
Here you can see it:
http://www.dassault-aviation.com/fileadmin/user_upload/redacteur/presse/in_the_air/Intheair_2_Centenaire_Gifas_GB.pdf