Plan 9 doesn't support multiple monitors currently, and I don't know how rio would like having some weird shaped display if you're monitors aren't all the same resolution. Having applications support that would be the hardest part I feel.
Also: You could totally add the support for what you want in drawterm. I've added stuff I needed a few times and it's pretty easy to understand and modify barring the normal unix bullshit. Window size and *proper* fullscreen shouldn't be hard. -- Veety
