Xbox One is in a worse position than Switch for now, Switch has tons of momentum and Microsoft is fighting an uphill battle against a slow start. It's difficult to build momentum for an unpopular console mid-cycle, look at Saturn, GameCube the original Xbox, or even SNES (sold OK, but worse than NES). Turning it around takes big games and even when you come up with a hit, if everyone's already convinced the hardware is a dud, it's much worse than launching a whole new console.
Microsoft the company is in a fine position. Lots of people saying it's just like PC - so what? Microsoft has a huge stake in that platform, too! Nintendo is in a bit of a riskier position than the past with Switch eventually being the only console...but that's assuming they give up the handheld line, which they don't have to. Nintendo's push to expand it's IP into theme parks and mobile makes more sense than it did to me a year ago because now they have just one piece of hardware - need more products to sell.
Sony is actually in a risk position, long-term. If Nintendo's hybrid concept becomes more and more popular, Sony may find itself having to compete with Nintendo in the handheld space again, which they've never beaten Nintendo at before. Or else continue to take the "home console exclusive" stance which could be a shrinking market.
PS 4 is fine, of course, but let's see how "PS 6" does.







