Yeah I was more pointing out that my Acer Predator already has per-key RGB color, etc., There is far more creativity on the Windows hardware side--even the Surface Pro line as an example.That's seriously great pricing for your specs.
As for using your Windows laptop as a monitor for macOS, you can run macOS Ventura using WSL -> Ubuntu -> QEMU and then use Airplay to Mac. I do run Ventura on my Windows system though I've not tried using it with Airplay to Mac but I don't see any reason why it shouldn't work. There is always some lag using Airplay to Mac though it can range to not noticeable to bad. I've used it from my Studio to my iMac Pro and it works fine as a monitor.
The industry has been going back to boring on thin-and-light and creative laptops. If you're talking about color in terms of lighting, then there are gaming laptops with lighting packages. The MSI Raider 16 is an example. You could probably rig something up for color on a MacBook Pro with a USB port a self-adhesive LED strips. Not my cup of tea as I use boring laptops.
I like your idea for QEMU, thanks! I'll check it out.