I think a lot of people are trying to make Scorpio into the next Xbox generation when it isn't. It's not going to be a mass market item. It's going to be just like the Xbox Elite Controller. Marketshare isn't what the Xbox Elite Controller is after (though it would love to be the most bought controller), it's after being a premium product after users who want a "premium" experience. Scorpio is the same thing. Yea, would they love for it to be the most successful console, yea, but are they marketing it and pricing it as it would be, probably not. A premium priced product is like a MacBook, surface, Samsung TV, Sony TV, etc...they are going for straight profit and a product that backs it up in the eyes of its users.
Can the Scorpio invigorate sales? Sure. Will it be the mass market device out the gate? Probably not. That's what the Xbox One S is for. I think people seem to forget that Microsoft just has to sell to their strengths and bring the games that gamers want to play at the end of the day? Why? Because this generation they are being beaten by Sony 2:1...but what does that also mean? They can sell their Xbox to all those people who don't have one. That's why they need to focus on their games and have good hardware so if there's enough games that a person wants, there will be good enough hardware to justify getting the other system.
Just like how there are those who don't have a PS4, there are much more who don't have an Xbox. Yes, they aren't missing out on multiplats, but they are missing out on exclusives, so MS just needs to bring the number of good exclusives up in order to sell to those people.
Also, Sony is doing the same thing with PS4N. They already have the majority of gamers, they just need to get those who don't have their system yet. They are in a better position to do so.