May be too soon to tell, but it looks as thought NSMBWii is pushing hardware. Good job, Big Ninty.
Nintendo did an amazing job at giving back to Wii some of its lost glory but...
I highly doubt NSMBW alone can carry Wii 4 whole months until Golden Week.
The previous 2 years for Wii were succesful by half.
2008: Strong first half, weak second half
2009: weak first half, strong second half
2010: weak first half (unless Golden Week proves me wrong), strong second half