You can already run Linux apps using Termux and Termux-X11, and I’d say the performance would be better than this demo, because this is running in a virtual machine and uses it’s own kernel, whereas with Termux you’re running your apps directly on top of the Android Linux kernel. Also, you don’t have the overhead of running ChromeOS on top of Android.
So, are there any plans to reduce the bloat in KDE, maybe even make a lightweight version (like LXQt) that’s suitable for older PCs with limited resources?