I'd love to see some windows added to them; they don't even have to "exist" inside the house (just like the Tower ) as I'm sure this would bring more harm then good with all the cupboard and items on walls placement being compromised because of them...
Although if they do exist it would be cool to be allowed to peek outside (like roads or doors) but without a "floating" eye, like a stealthy/sneaky way to peek outside.
And finally, the real reason behind this idea is to have a little (dim) light source from houses. It's a bit weird that they're always lit inside (maybe there are torches on the ceiling?
) but since that happens, we could have some light coming out from their doors (and windows, maybe) 
That would make villages even prettier at night without needing to spread torches/candles everywhere =D
