There are? Got some proof? EA may be richer....and it depends on what you consider a "video game company"...technically if you consider Microsoft a video game company that would make THEM the richest and it wouldn't be because Microsoft is the best video game company. Same story for Nintendo. Like was already stated, their gameboy hardware and software are absolute cash cows for them and they ARE the reason they haven't gone the way of Sega already. There is no question that the N64 and the Gamecube were failures in comparison to the competing systems and Nintendo's own other hardware....so it's a simple business decision for Nintendo to cut the least successful pieces of their business. That is why the Nintendo head guy has already stated that if the Wii is not the success they are expecting it to be, it will be their last home console.
The whole thing is no different than the decision Sega made years ago. If you're getting beat in a certain area but excel in another, you concentrate on what you excel at to maximize your profit. That is what Nintendo will eventually do too - they make the best games of any company in the world but haven't been that successful with home consoles since the SNES, so their days of home consoles are close to done.