oui I wonder if it's actually possible to replicate my X environment in wscons.
mlterm has console-framebuffer support, but, I haven't used it.
window certainly lets you run multiple pseudo-TTYs on the console and you can centre/resize/move the PTYs, but, it only has an ASCII UI.
There is also fbpad but, that's (as yet) Linux only.
(Porting to the NetBSD framebuffer console shouldn't be too hard: just the OS-specific FB back-end would need some change, and those should be pretty minor.)