well, to be honest, console whores like me will get both...i support nintendo and sony consoles (sega when they were alive)...im not a fan of xboxes tho...
i think they will sell... i think they will get their marketshare and make the money back... i'd want the wii to do well though. i'd hate to see nintendo do poorly enough to drop out of the console wars, but yeah... i say with all the (possible) capabilities a PS3 has, it will emerge to be on top again.