The new redesigned morphic gui system (which was one of the key drivers behind Juan's forking from squeak to make cuis) is FULLY driven by vector graphics. You

The new redesigned morphic gui system (which was one of the key drivers behind Juan's forking from squeak to make cuis) is FULLY driven by vector graphics. You can take any element, including any arbitrary window, and scale (or rotate) it to your hearts content, up or down. Smooth as silk. Re: practicality. Cuis is a ruthlessly simplified smalltalk, so it should be easier to dive into. All ancillary functionality has been modularity out of the base image & into external packages (yes, cuis has a package browser builtin). One of the cuis core contributers now uses cuis as the main platform for his "Dr Geo" maths teaching program (kind of like a live notebook'ish system for playing with geometry & related maths concepts) - a non-trivial app.