personally i would love to have a keyboard and mouse for my duo. turn it into a 16-bit computer. have a slimmed down operating system that loaded off of cd. I know i'm pipe dreaming here, but i would use it.
at that point, it would be a 8 bit computer, really. lol.
If you want to do that, seriously, just get an Apple IIC. It's got the same CPU in it basically.
Sure the graphics look like wang, but its not that bad!