That article you're quoting is from August of last year, whereas the one I linked to is from January of '07. And it looks like right now this release is on the down-low, not quite ready for an official announcement (probably because, like all big releases, it'll be pushed back a quarter or two).
Edit: Actually, it looks like there was an official announcement in January:
http://www.highdefdigest.com/news/show/CES_2007/Disc_Announcements/CES:_HD_DVD_to_See_300_New_Titles_in_2007/417
Firing the opening high-def salvo of this year's Consumer Electronics Show, the North American HD DVD Promotions Group held a press conference late Sunday, with format-supporting studios previewing several high profile new disc titles to come in 2007.
Though exact specs and street dates are still to be announced, primary HD DVD backers Universal Studios Home Entertainment, Warner Home Entertainment and Paramount Home Entertainment released an impressive short list of some of their most highly-awaited new and catalog releases due in 2007.
....
TV on HD DVD will also heat up in 2007, with Warner/HBO issuing more of 'The Sopranos' in season-by-season sets, plus the new Battlestar Galactica' from Universal, and as expected from Paramount, the original series of 'Star Trek,' which was digitally remastered and retooled in HD late last year.
And I mean, seriously, did you expect them to go through all the work of transferring that series to HD, and NOT hop at the chance to make some quick cash? But anyways, there you go--it was announced.