FIFA on PS2 apparently keeps selling.
There's always going to be a cross section of budget consumers/countries. PS3/360 will likely be around for many more years too.
If I was a cash strapped parent, you know honestly it's not like $99 Wii mini + Mario Kart Wii (or a $10-$30 Wii from a thrift shop) is suddenly less enjoyable for a kid today than it was 6-7 years ago if they don't have access to any other console.