I think this looks amazing. I do like the behaviour of tiling WMs, but having a DE is too comfy for me to give up. This could possibly bring the bestof both worlds.

There are already ways to have tiling and a DE.

On GNOME, there’s PaperWM, although it’s not quite traditional tiling either.

On KDE Plasma 5.27+, you can use Polonium. For versions before 5.27, Bismuth.

And on Xfce or LXQt, it’s often possible to use them with a traditional tiling WM, like i3wm, bspwm etc…