Yes it can!
Will it though? It really depends on the games. Zelda Wii must come out this year, and hopefully it will be designed to appeal to more than core Zelda players.
Also, I don't think Metroid or Galaxy 2 will make a significant difference to hardware sales, so if Zelda only comes out in November and there are no other potential audience-expanders between now and then...it could be iffy.
I do think the first six months of 2010 will outpace the first six months of 2009.