There are two angles to look at this from.
1. Did Sony the company get it right with Blu-Ray? Sure, it's been a massive success and in the future may be able to take over majority market share from DVD.
2. Did Sony's gaming division get it right with Blu-Ray? Not at all. It is one of the main causes of the PS3 high price, and the high price is a big reason as to why Sony is dead last. Not to mention that it put the costs up so high that they are still getting a negative return on each PS3 sold.