ARM's big.LITTLE architecture could feasibly bridge the gap between mobile and portable devices. I recently acquired a ODroid XU and a bunch of peripherals to s

ARM's big.LITTLE architecture could feasibly bridge the gap between mobile and portable devices. I recently acquired a ODroid XU and a bunch of peripherals to serve as a modular mobile computer. Right now it complements my laptop and phone, but eventually I could see it replacing both by getting a small "tablet" that's basically a display/speaker/mic and a pico projector + tiny wireless keyboard. All of these components already exist, but the LCD and projector are currently out of my price range for what's essentially a fun experiment. There are even battery banks available for around $99 that can charge USB plus many laptop models, and can be used while charging (something most cheaper USB battery packs don't do). The biggest issue will probably be keeping the thing powered all day. In the medium term I can even see the possibility of a shift away from ultrabooks and toward more modular laptops, since the giant battery needs to live somewhere. Then you could have a mobile device tethered wirelessly that doesn't need the same level of components (except maybe GPU) and the battery can be reduced further.