I have a vision of the World in near future where no one has to carry multiple electronic devices, but can instead use a fully-capable pocket-sized computer-communicator (PCC) anytime, anywhere - for example, to enter long texts or edit a spreadsheet with 15-20 columns "on the knee". Where an average middle-class family will be able to save few thousand dollars on laptops, tablets, phablets, their accessories etc. they won't need anymore. The World without planes, trains, cafes and buses cluttered by laptops, tablets and their bags. Most popular smartphone models can be equipped with 2-3 innovative accessories and converted into PCCs at a fast pace, so the worldwide market potential is expected to be huge.
The project is now in the stage where working prototypes have been created and publishing/preparation for crowdfunding is starting. It comprises 2 innovative, if not revolutionary, accessories (patents pending) for existing 5"-6" smartphones converting them into a pocket device capable of replacing a 9"-12" laptop, ultrabook or tablet for 90-100% of common tasks, without using external monitors, keyboards etc.
These cheap ($80-150 for the bundle) and compact (slightly bigger than a bumper case) accessories will also solve the dilemma of physical vs virtual keyboard 'cause the benefits of both will be combined while their flaws eliminated. Applications may easily go beyond mobile devices to become a hit in other areas (stationary PCs/home theater, VR, pro applications like military, automotive, etc.).