Spider Computer by Nikolaus Frank

Its three legs can easily be folded out, allowing it to be placed on a flat surface. The mirror head opens, and the projection is directed towards the table surface or a wall. Digital correction compensates for angular differences in projection versus surface. Working prototype was made for technology, user studies and research. When legs are folded into the body, it becomes a mobile device, used as a phone, for messages etc. Circular LCD display with graphic interface. It can be carried in your pocket and brought anywhere.

Yanko Design

Transparent 3D Desktop

Users can casually open up the See-Through 3D Desktop and Type on the keyboard or use a trackpad as in traditional 2D operating environment. Windows or files are perceived to be placed in a 3D space between a screen and the input plane. The user can lift up his hands to reach the displayed windows and arrange them in this 3D space.

Cargo Collective

Finally, a computer the size of a thumb drive!

FXI is preparing to launch the Cotton Candy, a tiny computer that looks like a USB thumb drive. The device, which can run either Ubuntu or Android 4.0, has a dual-core 1.2GHz ARM Cortex-A9 CPU, 1GB of RAM, and a Mali 400MP GPU that allows it to decode high-definition video.

It has a USB plug on one side, which is used to power the system, and an HDMI plug on the other side, which allows it to be plugged into a display. It also has built-in WiFi and Bluetooth radios for connectivity and supporting input devices. The system can boot standalone and operate as a complete computer when plugged into a display. It's also possible to plug the Cotton Candy into a conventional computer and boot from it like you would from a regular USB mass storage device.

FXI announced today that the Cotton Candy is available for preorder. The standard retail price is $199 plus tax and shipping. The product is expected to ship in March. The small form factor and relatively high specs make the product seem like a compelling choice for enthusiasts who are looking for an ultra-compact Linux system.

Ars Technica