According to this TG Daily piece, Blu-ray’s fortunes are being propped up heavily by PS3, as if that were in any doubt. From the piece:
The Entertainment Merchants Association (EMA) released its 2008 annual report with a wealth of data revealing the most trends in TV, home video and video gaming segments. The flood of data reveals that video game publishers are closing in on the revenue of stagnating home video sales, Blu-ray looked like the losing HD format in 2006, but was able to reverse the trend thanks to the PS3 in 2007, Microsoft has sold 316,000 now useless HD DVD add-ons for its Xbox 360 console and the average person now spends $310 on movie and game entertainment per year.
A lot more through there, if you can be bothered.