I think it's the social aspects and community features of Xbox Live that's establishing the brand of the Xbox. Xbox Live is currently the strongest digital service on consoles.
No doubt there will be several gamers that will stick with Microsoft just because they don't want to lose their achievements/gamerscores, regardless of whether the service sucks or not. We are already seeing that with the hundreds of thousands of Xbox owners that still back X360 despite RROD failure. There was some guy on Neogaf that had his Xbox 360 die 12 times! And he still comes back to the Xbox.
But I think Microsoft might face a serious problem later: since Xbox Live requires subscription it will gain "full" members far slower than Sony's PSN and Nintendo's whatever, and if Sony/Nintendo do up the quality of PSN/whatever, then Xbox Live could be "royally screwed".
This is about who wins the "Social Gaming" race.







