As you wish, I think you're wrong partially at least
If you goto Amazon you can already see that their prices for Blu-ray movies ($20-$21 for catalog releases and $27-$28 for new releases) aren't too bad when compared to DVD movies:
http://www.amazon.com/exec/obidos/se...=%5Bblu-ray%5D
While I have no idea how Sony will price PS3 games, I don't think they will cost more than Xbox 360 games. My guess would be $50-$60, but I don't really know.