Is the main reason to get a Mac for mainstream consumers due to the integration of macOS and iOS? I do miss being able to answer a FaceTime call on my Mac and answering an iMessage directly on the Mac without picking up my phone.
So it's beyond that and you won't be able to just ignore the OS difference. Here are a few:
1. Software updates are not forced down your throat. You will not wake up one day to find your laptop trying to spend the next 2 hours updating to the latest software like you do on Windows. MacOS can be told to ignore updates altogether for a while, so the computer is always ready for you to use.
2. If you ignore the above, then on Windows, your display brightness can differ greatly between plugged in and unplugged due to power plans. There's no such thing on MacOS.
3. If I'm watching a fullscreen movie on my Mac, and someone asks me to do something very quickly on the computer, I can simply pause, swipe trackpad to go back to desktop, and then do that thing. Once done, I can go right back to the movie without having to change anything else. No such seamless workflow in Windows. Also picture-in-picture video mode doesn't work everywhere in Windows but it's standard on MacOS. As in I can right click any random video on any site, select picture in picture with it and have it displayed in a small window alongside my work window. Very useful when I'm trying to follow a tutorial.
4. If I switch audio hardware (for instance... from my MacBook speakers to my external bluetooth device), this works pretty much everywhere in MacOS, but it doesn't work with all apps in Windows depending on your app settings. In general, you can connect your Windows laptop to a TV and you may still have to fiddle with audio settings to get everything to work seamlessly and properly.
5. My clamshell MacBook can be plugged directly into power and an HDMI display/TV, then if I tap on a key or click the mouse, the device comes on, connects and just works. This does not work with all Windows devices and requires certain settings in BIOS that only comes with certain pro devices, but it's just a standard feature in MacOS.
6. In fact, even having the laptop open and everything, connecting an external display doesn't work all the time. You have to go into display settings, adjust settings for that external display (or for those external displays) the first time a connection is established before the display comes on. Connecting an external display to Mac works very different: it'll mirror the internal display and the external one by default on the first connection without any change in settings.
7. Try to add a network printer to Windows. Not seamless. Adding network printer on Mac? Just go to the menu, select add printer, wait for printer to appear, select it, done.
8. Beyond this, Mac-supported peripherals in general just... work. You should already have the right drivers for them. Just connect and boom, they're there. Scanning wirelessly? Go to Preview app, select File menu, the recognized scanners are already there. Just select one and follow the prompt to scan. Scanning on Windows? You better have a dedicated app for that, plus corresponding drivers.
Okay, so at this point, you can say I just can't stand Windows. Fair.
But beyond that... the base MacBooks are now fanless and in general silent compared to most Windows laptop offerings. Ignoring battery life and such, the base MacBooks make basically no noise. And couple with some of the more seamless things mentioned above, the experience of using a MacBook now in 2023 is: you just open it up, set it up, and use it. You don't worry about drivers. You don't worry about battery life. You don't worry about trying to "make it work" a certain way. For the most part, it just works for most of the basic tasks. And then anything more advanced, there are apps and such to support those use cases.
In general, the OS may not matter much but it's entirely possible to run Windows alongside MacOS now in a virtual machine, but the opposite is technically not true. If I need to do anything in Windows, I still can with MacOS, while vice versa is not entirely possible. x86 or not. So to me, a MacBook is beyond seamless, it's basically just a superset of Windows now. If I need Windows, I just spin up a virtual machine and use it like that. There's no loss of functionality even aside from maybe... touch screen? But I can just wirelessly connect my iPad as an external display in a pinch. There's no such thing for Windows that you can set up in the blink of an eye.