Right now, the Blu-ray Disc and HD DVD next-generation DVD camps are engaged in a brutal battle for market share, where only one is expected to be the winner. Capturing a critical mass of consumer dollars also means capturing the consumer's faith that a particular format will be the winner. No one wants to sink money into the next Betamax. All this means that next-generation DVD sales numbers are becoming more critical, both as an indicator of actual sales as well as a guide to what your fellow shoppers might be thinking.
Currently, the only real source of independent sales data on next-generation DVD sales has come from Nielsen VideoScan, a member of the well-known Nielsen family of companies that generate the ratings used to determine the popularity of TV programs.
Nielsen has tracked sales numbers since November, and provided weekly data to industry trade publications on a week-to-week basis. However, the firm sent over a spreadsheet to Foxnews of all of their numbers, [which clearly show Blu-ray taking a huge chunk of market share from HD DVD since November 2006.]