Blu-Ray royalties won't save the PS3 from being marked as a failure. They aren't as lucrative as you might think.
I mean, it's good in the sense that it's basically free money because all the development work is a sunk cost they probably paid off awhile ago.
http://www.myce.com/news/Blu-ray-pri...vestories_week
The licence fees are:
$9.50 per player
11c RO disc
15c RW disc
According to this, Sony own less than 30% of the IP:
http://news.cnet.com/8301-10784_3-9874317-7.html
Let's say they own 1/3. So for each player, Sony gets ~$3, and for each disc, they get ~4c.
According to this, 177 million Blu-Ray discs have been sold in North America to the end of 2009. So Sony will have taken $7.08 million in royalty revenue for discs in North America to the end of 2009.
Clearly that doesn't give the whole picture (I can't find solid numbers for the players, and that's North America only), and it will definitely grow. But to make up for the billions they lost, it's going to be difficult.
I'll try and find some numbers on DVD royalty revenue for comparison. I don't think Blu-Rays will ever reach the point that DVDs did.