According to an article at DigiTimes, Lite-On expects the global demand for DVD burners to hit 120 million this year.
Global demand for DVD burners, thanks to continued drops in prices, will rise to 120 million units this year, growing by 50% from 2005, according to general manager Michael Gong for the Optical Disc Drive Business Unit of Lite-On IT.

Part of the increased demand in 2006 is due to replacement of Combo drives (CD-RW plus DVD-ROM) with DVD burners because the price gap between the two have narrowed, Gong pointed out. Super Multi (triple standards) may supersede Dual modes as the mainstream type of DVD burners this year, Gong indicated.
If you want to read the entire article, head on over to DigiTimes.