Electronic Arts predicts that the PS3 will outsell the Xbox 360 in 2008, with the Wii beating them all. You can read all about it here.
I don't know why this is attracting so much attention. A lot of people already own Xbox 360s and Wiis, so this would be the year they buy the PS3. It just makes sense.
To date, Microsoft has sold about 17 million Xbox 360 while Sony has sold 8 million PS3s. If the projections are correct (and note the projects are for the US and Europe, only) then you'll bring up those totals to abouut 24 million Xbox 360s and 18.5 million PS3s.
The point here is that both are selling very well. The "console war" is a myth. Gamers will eventually have all three systems. It's no longer a matter of one or another.