@ Noname2200
Strategy Analytics connected Home Devices service (via CNN) predicts 44% of US households will have Blu-Ray by 2012. 132 million homes worldwide, so about 6 years after introduction.
VHS took 15 years to reach a 100 million units counting from the first VCR recorders being introduced in the united states. Note this figure is VCRs sold which accounts for fewer households as some households will own more than one VCR.
For DVD the 100 million worldwide household figure was reached by the last quarter of 2003. First DVD players hit the market in December 1996 in Japan and March 1997. So after about 6 and a half years.