It's a slightly moot point - a 'comeback' implies a still competing opponent. Nintendo effectively stopped supporting the Wii at the end of 2010 (Zelda:SS did get a late 2011 release, but after that and between it and DKCR in 2010 I can't think of any major Nintendo-developed releases) for reasons best known to itself. That the PS3 could well reach 100m eventually is quite an achievement given its start, but the tortoise beating the hare would say more about the hare than it would the tortoise in this scenario.