Not to be a wet blanket, but no investment decisions have been made. If you read the article carefully you will realize that they aren't even to the survey stage yet. What they have done is that they have hit the EU up for 23 million euro in funding.
So far the estimated costs of the project are 1 billion euro, and that's projected to be considerably more costly than non-Arctic routes. So they have a lot of fund raising to do if they want to actually make this happen. And, let's face it, the easy money has already been raised. The EU is more than happy to pay 23 million euro, much of which will end up in Nokia's hands, to study this. Actual business people, spending their own money, are likely to be more skeptical. Especially considering the fact that comparable cable that doesn't take this route would only cost 250 million euros.
This article is really just a fancy advertisement for something that is probably not a good idea. The article actually does a good job of covering that part of the story. You have to read down a ways, but it is worth it. True to form the EU has already invested heavily in this project. I personally think that says more about EU spending than on the viability of the Northwest Passage for fiber optic cables.
If, on the other hand, you felt strongly enough about the direction that the climate was headed on this planet that you wanted to make a big bet on the Northwest Passage becoming a viable route for fiber optic cables, I suspect that their is an opportunity here to put your money where your mouth is. These people are going to need a lot more money than they currently have if this is to get off the drawing board.