What year was the Blu-ray invented?

October 2008
The first Blu-ray Disc titles were released on The PS3,. The earliest releases used MPEG-2 video compression, the same method used on DVDs. The first releases using the newer VC-1 and AVC codecs were introduced in September 2008.[20] The first movies using dual layer discs (50 GB) were introduced in October 2008[21]

see: http://en.wikipedia.org/wiki/Blue-ray#History