Blu-Ray is outselling HD-DVD by something like 6-1. It has about 75% of the marketshare. HD-DVD is not expected to last beyond 2008, and it will rapidly decline throughout the year if you haven't noticed the massive decline its already taken.

http://www.digitalbits.com/articles/miscgfx2/nvshddata020308.jpg

This is the sales data for the current week. Its pretty much characteristic of the last six months or so. By summer, I'm sure Blu-Ray will have something closer to 85%, with close to 100% by Christmas when HD-DVD makes its last hurrah (Wal Mart already has HD-DVD players in its clearance section).