Yeah, I'm pretty tired of these topics too. There's no way anyone can prove at this point whether or not Blu-Ray will be the next big thing.
Just to add a little more context however, everyone should keep in mind that this market share comparison only tracks sales of the top 20 discs - which tends to favor Blu-Ray pretty heavily (as the huge backlog of old DVD titles don't get counted at all).
EDIT: D'oh! Beaten by Fishy Joe.
End of 2008 totals: Wii 42m, 360 24m, PS3 18.5m (made Jan. 4, 2008)