It wouldn't work. There is already Steam among many others. The great thing about Steam or GOG, humble bundle ect is that they all offer their own as well as third party stuff. Nintendo would not be able to do it on their own, even if they did buy a few companies. The reason they are trying to unify their platform is so there will be a greater catalogue with less time between releases. Along with that, what these others do is give insane deals, which would cut the profit margin for Nintendo big time since it would all be first/second party.
There is no reason to be freaked out by what is happening. Read up on it more and you should be fine. This is actually putting them in an extremely strong position.
Gotta figure out how to set these up lol.
