It's pretty clear that Microsoft would have been on top right now if it weren't for Nintendo's disruption. If anything (and I'm not saying this is likely), we have more chance of losing Sony than Microsoft, as Sony's company as a whole has been suffering pretty badly. Microsoft is making billions on top of billions from PCs and other Windows-based devices, so if they need to eat a few billion to keep their console/set-top box in the race while it builds its brand name, that's nothing for them. Actually, given how adaptable Microsoft has been when it comes to successfully making winning strategies their own (see how they saw what Sony did with PS2 and paplied it to Xbox 360, and what they are now doing with Natal after Wii), I could see them winning the next generation if Nintendo doesn't pull another fast one.