http://rt.com/news/166680-hp-silicon-photonics-computer/
it's more powerful than all the computers in the world since
but IBM has a product they are making which could be better than the machine in later years http://www.3news.co.nz/IBM-shows-off-brain-inspired-supercomputer/tabid/412/articleID/356673/Default.aspx
the machine is scheduled to be commericially produces around 2016