This makes no sense.
PC's and consoles are different devices with different strengths and weaknesses. To claim that "there's really no need to own an X1" is both partially correct (by design), and partially false (illustrating your misunderstanding).
If you think you don't need a console anymore, that's great! You now the option to game on a PC and you'll get all the benefits that brings with it (more power, more customization, etc.)... and both you and Microsoft win. You win, because (in your opinion) you don't need an Xbox anymore, so MS just saved you a ton of money. MS wins because they've earned your business on the most powerful and flexible platform in the world (Windows 10, which happens to be theirs).
How is that bad, let alone "seriously bad" for anyone? Giving people real choices and options?
Now, I for one would NEVER game primarily (let alone exclusively) on a PC, and here's why:
1. Price of entry is too high for power experiences. Consoles still offer the absolute best performance bang for your buck. Same spec PC's vs. consoles will always lose in real-world perf, so just to MATCH the performance of a console, you need to buy something much more powerful than a console.
2. PC is a pain in the ass: Startup and entry into games. On my Xbox, I walk in the door, I say "Xbox, On" and within seconds my whole living room is powered on, ready to go. I pick up my controller, and within a minute or so I've launched into the game I want to play. Easy, fast, simple. On PC, I have to wait for the thing to load up, sign in (password protected, since it needs to be - as I have lots of secure things on my PC), wait for my game hub of choice to load up, THEN launch into a game, and hope that it works. It takes way longer, and is a much bigger pain in the ass.
3. PC is a pain in the ass: Software and hardware compat. I HATE dealing with incompatibilities, and they're all over PC's. I use STEAM on multiple machines, and Age of Empires II HD just doesn't work on one of my machines. No idea why, it just fails. One of my games had terrible performance and stability on a popular FPS until I updated my drivers... and then it was just 'alright'. No company in the world can ensure their products work on every combination of software and hardware configs, so inevitably it takes WORK just to get things running... PAIN IN THE ASS! Have I EVER needed to do that on my Xbox One? No. Not once.
4. PC is a pain in the ass: Gameplay/perf inconsistencies. Even with better-than-console specs on a PC, it's not uncommon that perf hitches inconsistently. I'd VASTLY prefer a steady 900p/30fps to 4K inconsistent/jitter/hitchy-ville... and performance on PC's is just terribly unpredictable. Oh, and let's not forget about all those little background tasks that, if not managed, can also kill perf. PAIN IN THE ASS! Do I deal with that on my console? Never. To get a flawless experience that's as consistent as a console, yet meaningfully better image quality, I'm looking at 3x to 4x the cost of a console (minimally).
5. PC is a pain in the ass: Input devices. To run a PC decently in a living room for gaming, you'll need a mouse, a Keyboard, and a controller. With Xbox, I have a controller I can use - and EVERYTHING I need to do can be done with it... not to mention, voice controls are an awesome ease of use addition, which doesn't work nearly as well on PC. I don't want a mouse and keyboard in my living room. have enough remotes and controllers, I don't need more clutter... not to mention, what a pain in the ass to have to use a mouse/keyboard to start up the machine, and THEN transition to controller for playing games... PAIN IN THE ASS!
Those are just the top 5 reasons I'd NEVER choose PC gaming over console. I don't like PC gaming. Windows 10 has warmed me up to it a bit, but I don't generally like gaming on PC's for all those reasons (and more).
So yes, there is still a reason (many, in fact) to own an Xbox One over a PC.
But the most elegant and beautiful part of MS's strategy is that they won't make you choose. You'll buy the games once, and play them anywhere. If you're like me, you probably have a PC in some room that's NOT your living room, and a console in your living room... in MS's vision, you can play the same games in both places anyway. Buy into the PC realm for the most powerful gaming for a while? No problem! Your Xbox games go with you. Get burned out on PC expenses and annoyances? No problem. Get a console, and your games go with you... It really is the best of both worlds, because they're the same world now... and whichever works best for you is where you can game.
I love it.