Merlins has a nice timeline of events starting this year leading to the demise of HDDVD.
http://forums.highdefdigest.com/showpost.php?p=762721&postcount=25
2008-01-04: Warner announce they goes Blu-ray exclusive. Delay all their new HD-DVD releases and will stop completely with HD-DVD after May.
2008-01-04: Universals movie Lust, Caution is first announced for HD-DVD but this was a "clerical mistake" and the title should not have been announced for HD-DVD, only DVD.
2008-01-04: HD DVD Promotion Group cancel their press conference at CES.
2008-01-08: New Line goes Blu-ray exclusive. Pan's Labyrinth is the first and last HD-DVD disc from New Line.
2008-01-09: HBO goes Blu-ray exclusive.
2008-01-09: All quiet on Universal front.
2008-01-09: Microsoft announce they are neutral in format war. Amir Majidimehr quits Microsoft at 2008-01-15.
2008-01-10: Paramount delay titles.
2008-01-11: Constantin Film goes Blu-ray exclusive.
2008-01-14: Toshiba have a fire sale on their newest models just like then they sold out the A2 player. No new players announced from the only producer of HD-DVD players...
2008-01-14: Digital Playground said they might go Blu-ray exclusive during 2008.
2008-01-16: Senator Home Entertainment goes Blu-ray exclusive.
2008-01-17: Paramount announce it's complete Q1 2008 slate. One new title not announced before was included (The Kite Runner), otherwise nothing new.
2008-01-18: Universal announce it's first and only one movie after Warners announcement. The box art did emerge a week before Warners announcement and is the first new title since December 18. One title per months from Universal?
2008-01-20: R&B Films goes Blu-ray exclusive.
2008-01-21: Trans World, one retailer with more than 800 stores starts to make more room for Blu-ray
2008-01-22: Grant's Appliances, one of the top 30 electronics retailers in the US, goes Blu-ray exclusive.
2008-01-24: Circuit City have a clearance sale on their last HD-DVD players. The price is now $100.04 for the Toshiba HDA3. EDIT: The price was later changed by CC to standard $149.
2008-01-24: SF Film, Swedish distributor, goes Blu-ray exclusive.
2008-01-24: Scanbox, Swedish distributor, goes Blu-ray exclusive.
2008-01-28: Woolworths, one of the bigger retailers in UK with 820 shops, goes Blu-ray exclusive.
2008-01-28: FS-Film, Finnish distributor, have gone Blu-ray exclusive. Confirmed by email and all HD-DVD pages taken off-line.
2008-01-29: Wal-Mart starts to have HD-DVD players labelled as clearance items.
2008-01-29: Saturn, one of the bigger German retailers, have a exchange program to replace HD-DVD with Blu-ray.
2008-01-30: National Geographic have gone Blu-ray exclusive.
2008-01-30: Sonic Solutions, the largest developer of professional mastering programs, goes Blu-ray exclusive.
2008-01-31: Surround Records, former HD-DVD exclusive distributor, goes dual-support.
2008-02-01: Paramount announce Sweeney Todd, the second new movie announced by them this year and the third for Paramount/Dreamworks+Universal.
2008-02-01: Imation stops making HD-DVD-R/RW media and goes Blu-ray exclusive.
2008-02-04: BAC Films, French distributor, goes Blu-ray exclusive.
2008-02-04: Manga Films, Spanish distributor, goes Blu-ray exclusive.
2008-02-04: Onkyo drops HD-DVD support, atleast for now, in UK.
2008-02-05: Universal announce their second title after Warners announcement.
2008-02-05: OVA Films, German distributor, goes Blu-ray exclusive.
2008-02-07: Filmmax, Spanish distributor, goes Blu-ray exclusive.
2008-02-06: Microsoft drop the price on the add-on.
2008-02-08: Universal drops the re-issues of two titles, a large part of all announced titles for 2008.
2008-02-08: HiFi Klubben, Scandinavian retailer, goes Blu-ray exclusive.
2008-02-11: Netflix goes Blu-ray exclusive.
2008-02-11: Best Buy recommend Blu-ray and prominently showcase Blu-ray.
2008-02-12: Tripictures, Spanish distributor, goes Blu-ray exclusive.
2008-02-13: Paramount postpone Star Trek: Season 2.
2008-02-13: Wal-mart stop selling the HD-A3 and leaving the last HD-DVD player, Venturers Toshiba player at clearance.
2008-02-14: Opus Arte, former HD-DVD exclusive studio, goes neutral.
2008-02-14: Cameo, distributor in Spain, goes Blu-ray exclusive.
2008-02-15: Niveus goes from HD-DVD exlusive to Blu-ray exclusive.
2008-02-15: Wal-Mart goes Blu-ray exclusive.
2008-02-16: Toshiba planning to stop production of HD DVD.