I've got a $100 tablet and $30 bluetooth keyboard running windows. This means that I have a small form factor machine that I can develop on, and with a usb otg cord, I can connect to near anything I want. Finally, it comes with a real bios, so I can install whatever operating system I want on it, without doing silly things like removing screws.
Development is mostly using Avr Studio to do embedded stuff. The tablet was the Asus VivoTab8, the non-note version, unfortunately. The bluetooth keyboard was just some generic keyboard and case [1]. My only complaint really is that the meta keys are cranky within putty, but other than that, it's been pretty solid for me.
