As Blu-Ray production goes up, the price will come down, plain and simple.
Retailers and movie studios will continue to push it hard -- Blu-Ray will save a lot shelf space for collections, and 1 Blu-Ray disc is a lot cheaper to produce than 6 DVDs, for, as an example, a single TV series season. TV seasons/movie collections hold a downright huge portion of the DVD market these days, and the movie studios (and retailers) stand to benefit a truckload by switching to Blu-Ray for those collections.
Even HDTV series stand to benefit from Blu-Ray -- they are typically in 720p, and a full TV season of HDTV takes up about 3 Blu-Ray discs -- which is still cheaper to produce than 6 DVDs for a SD season, makes for a smaller shelf space footprint, etc. This simple fact (storage space advantage) is probably the primary reason Blu-Ray won out over HD-DVD at all -- the movie studios didn't want to be paying more to produce a 6 HD-DVD HDTV series than a 6 DVD SDTV series -- they, and the retailers, want more profit/cost, not less, obviously, and HD-DVD didn't cut it.