Ouch, hurts seeing the Wii in third! Though it really is a mix of the HD consoles also doing much better than last year.
Seeing Starcraft 2, a PC game at the top of the charts makes it all better though! 
As for the Wii being doomed, I still don't necessarily think so. People looking at these weekly charts tend to really overreact over these weekly skirmishes, but I can't stress enough how this still tells us nothing about the longevity of the consoles. Hell, I'll (once again) point to the PS2 in the US, as NPD had it:
2001: (7.4m)
2002: 8.42m (15.8m) <- $100 May price cut ($200)
2003: 6.32m (22.2m) <- $20 May price cut ($180)
2004: 4.63m (26.8m) <- $30 May price cut ($150), Slim model Sept, shortages
2005: 5.44m (32.3m)
2006: 4.70m (37.1m) <- $20 April price cut ($130)
2007: 3.97m (41.1m) <- Slim 2
2008: 2.50m (43.6m) <- Slim 3
2009: 1.80m (44.4m) <- $30 April price cut ($99)
These forums would've constantly called doom on this console, as it was down on years with constant price cuts, yet it never quit selling (see: 2005-2007).
As long as the Wii can hold up well in the holiday period (when all its games hit), it'll be fine.
