Mainly because it meant a cheaper PS3 ALOT sooner as I am sure SONY wanted to follow the PS2's footstpes in terms of price drop or even do better. Even the clearance sales where great as you got a system $100 cheaper with all the goodies. On top of all this the PS3 hasn't really lost any games though yeah there have been delays but what do you expect as the system is brand new and devs need to get used to it etc. None of this would have been possible without the 360. Just like all the previous generations at least for me once the price is right or it has a game I just have to get I'll have all the consoles.
By the way this does not mean it was good for SONY obviously but if they can withstand the start they should be fine. Even if the 360 where to fail today or the PS3 where to fail in the future both systems have had or will have great games that are worth getting for at some point to play them. The amount of gaming I done on my 360 has more than made up for the price it cost me. Basically competition is good and typically leads to good things for the consumer.
