Could the direct manipulation of individual atoms and molecules allow the creation of computers that could have exotic and weird shapes like a cube or even a sphere with flexible and/or continuous processing parts? I was reading about organic electronics and I read that computers could be soft and flexible using such technology and even an electronic paper could be the computer itself.
If computers had 3d shapes they would have far more processing power. I think that Spintronics, optical circuits, metamaterials and superconductors could solve the heat issue. And the interface would also not be an issue because futuristic computers could have holographic screens and keyboard controlled by thought or eye movements.
And these futuristic exotic looking machines could have processing power along all the material since the circuits would be created putting atom by atom, rather than concentrating all the processing power of the device in small square parts. However this process would make the chips much larger than today devices. Would that be a problem?
Another issue would be the size. What about a cube or a pyramid shaped computer measuring 5 cm across? Would that be an issue?