Not happening. Smartphones have killed any chance of seeing a handheld selling 100m.
I wouldn't be shocked if the 3DS tops out at ~70-75m, which are still great numbers for a dedicated gaming handheld.
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)