Although I think the whole virtual world idea isn't that good, Microsoft has a huge advantage in making this a far more interesting and useful service.
In theory Microsoft can produce a virtual world that works on the XBox 360, PC, PDAs and mobile phones in such a way that it integrates with MSN messenger and XBox Live. If it was free (or low enough cost) they would have the benefit of generating far more interest because it already would work on platforms that people owned.







