So who'll create a useable fold-up Fresnel-lens cover to turn that high-res high-dpi phone screen into something resembling a smallish monitor? I run Termux and sometimes Linux deploy on Android devices which turn these into fairly close equivalents to general-purpose pocket computers but even for my good eyes a somewhat bigger screen size at the native resolution would be preferable. Double the apparent size, keep the resolution and you'll get a perfectly useable 12" monitor.