I began to use my smartphone as a computer years ago, and today have a Galaxy Note 3, a Logitech Bluetooth keyboard and a tiny ASUS LED Video Projector. I hook the lot together using the Samsung MHL microUSB cable to pump 1080P video via HDMI into the projector, fire up the keyboard and Bob's your uncle. The keystoning in the projector works a treat. The whole lot take up less space than the smallest MacBook or Windows laptop. Best of all, the 'computer' components (the Snapdragon 800 powered Note 3), fits in my pocket, shoots 4K video, takes 13MP photos and I can talk on it.
(Typing this on my MacBook Pro 15" Retina with 1TB of SSD, because until Adobe port their suite across to Android or the cloud, a Mac still has it's uses! Namely, creating the content that I display on the aforementioned setup.)