Well, HD DVD managed to make a temporary comeback, when combining a period of slow Blu-Ray releases, and the massive April 15th HD DVD group buy. And from I've heard they came within 17,000 discs of actually matching Blu-Ray in sales.
Unfortunately for HD DVD, they couldn't keep up the momentum. And this weeks sales ratios are back to what is quickly becoming the norm for 2007:
Weekly sales ratio according to Nielsen for the week ended April 29:
http://forums.highdefdigest.com/showthr ... post123053
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media