That reminds me of Microsoft's Active Desktop in Windows 98, when the desktop had widgets that were web pages and would show webpage-related errors when something went wrong. We've really gone full circle over the last three decades.
It's not really using it for much text, though. It's mostly buttons and controls, which GDI, QuickDraw, and Motif did much better back then and newer toolkits like GTK, Tk, wxWidgets, DWM, Cocoa, etc are great at today.
