HD DVD has been dead since warner went to camp blu ray. if you think an official announcement is going to unleash a flood gate of people into buying blu-ray your kidding yourself cause those flood gates have already been open for a while now. at $400 the general public won't buy no matter how dead HD DVD is.
since a blu ray player is backwards compatible with dvd i think the transition is inevitable once both dvd and blu ray are comparable in price (who wouldn't want something better for the same price) but as long as a good dvd player is $50 and a blu ray player is $400 most people (myself included) will say that blu ray isn't worth the cost of admission. eventually though. just not quite yet.