I am more with makingmusic here .Someone once said that Microsoft had money while Nintendo and Sony have talent and thats just what I think about this situation .
Sony has an ability to attract and keep people with talent with them .Microsoft on the other way can buy them as they did with Rare ,Bungie and Lionhead but they dont have the ability to keep them or keep them focused .They dont have that kind of talent to leave them at their own doing whatever they want .As money is the way they attracted them they want money in exchange so they put them to churn out Halo 3 or Fable 2 or PGR4 as soon as they can .Sadly for them the Rare founders have left the team ,Bizzarre has been bought by Activision ,Bungie is sick of doing Halo after Halo and have broke free ,Lionhead was just bought so lets see what they can do .Other talented first party studios that they have been able to keep as Ensemble are more centered on the PC.Besides ,MS mimicks what can be done on the PC on their console ,there isnt a true creativity in most of their moves.The one big creative thing they made is the achievements system and it has paid off as many 360 owners are in love with their machine just for that .
Sony on the other hand has an ability to attract and keep talented people with them .They can have their high and lows but most of the people working with them directly are quite happy and so they have been able to recruit a developing force like no one has right now .Studios like Naughty Dog ,Insomniac ,Incognito ,Zipper ,Clap Hanz ,Team ICO ,Evolution ,Guerrilla ,Sucker Punch ,Ready at Dawn ,Relentless Software ,Studio Liverpool ,London Studio ,Sony Santa Monica ,Factor 5 ,NInja Factor ,SCE ,SOE ,Games Republic,Eat Sleep Play and many others are all belonging or closely related to Sony and will keep like that for the foreseeable future .
They have also a lot of talent in the engineers and people monitoring the PS3 and PSP software and possibilities .They amount of things the PS3 can do that it couldnt when launched is massive .And when they have acted to create something new to compete with MS they have come up with Home and the new achievements system that promises to go way beyond the MS one.They can also balance their other sections and leverage their products as Bodesthava said ,but I think the true force of Sony Computer Entertaintment is that creative force and adaptability to incorporate (copy as the haters would say ) other ideas while creating their own at the same time .Thats the reason the PS catalogues are finally the most diverse ones .
Right now the PS3 catalogue seems very akin to the 360 .Lots of sports games ,FPS and many driving games too .But ,looking a bit deeper we can see that many genres the 360 hasnt even touched are already represented on the PS3 with games as Ninja Gaiden Sigma or Heavenly Sword or Ratchet and Clank .Its sad the 360 doesnt have a single plattform game after 2 years on the market .Looking deeper we see some truly unique things as Flow ,Eye of Judgement and Singstar .And this will keep growing .