DVD DL media : getting popular in 2006?

Despite the fact that most of the DVD burner available or integrated into computers are now supporting DVD DL media, the market for such media remains marginal.
However, the request of DVD DL media should be multiply by 4 in 2006, from 50 millions media sold this year to 200 millions media next year.
One can expect that this increase should contribute to lower the price of such media that remains far too expensive for most customers.