A neat VFB feature

A patch was recently posted on qemu-devel that allows for the VGA device (when in CGA mode) to be rendered directly by ncurses. It's a pretty neat effect and given a more complete implementation would be really cool.

In fact, I think that long term, for Xen, what I would like is to support this by default and only use the virtual framebuffer if it's enabled by the guest.