Sony launched with a lot of features and a very high price. The machine was ahead of its time. Sony preferred to keep the price high to limit losses, and wait to open itself to the mass market later with to price cuts. Sony could afford to wait to cut the price, because its technology was so far ahead of its time that the risk of obsolesce was non-existent. Plus if Sony took a larger loss and sold it at a competitive price, each price drop would no longer serve as an incentive to buy. Also, there is no way the expanded audience of casual gamers who may have bought the console at a lower launch price would buy enough games to make the price cut worth it for Sony's losses.
The machine has so much staying power that Sony can afford to slowly cut the price, increasing its sales in intervals and ultimately finishing ahead of its direct HD competitor. The fact that Sony still has room to cut the price and blu-ray will only get bigger, along with its increased reliability, virtually guarantees that Sony will finish at least in second this generation. I would give the Wii the edge over the PS3, but with its staying power, it isn't out of the question that the PS3 can close the gap at the end of 10 years. Nintendo has built up such a large lead, that even though it lacks the staying power, I think Sony may not catch it. But for making a HD console, Sony had the right strategy. And Sony already had a successful standard definition console with the PS2 so making another SD console would lead to market saturation.