Why we would not have those games if there was not 3D
They wouldn't even be inspired to even think up those games. And therefore would have never been imagine up in the first place.
Monster Hunter 4 would of still happen, but as a Wii U exclusive, instead of 3DS exclusive.
King of Pirates (trilogy) would have been a PlayStation Home Console exclusive instead of a 3DS exclusive.
Paper Mario would have continue as a Nintendo Home Console exclusive and wouldn't have try out any new original gameplay mechanics, and therefore would have never been about stickers anything as well.
The Japanese still get inspired to come up with things they couldn't have imagine before, when something is different and new enough to inspire anyone. But we westerners seem to have lost that ability almost entirely, which explains our movies.