Firstly, you'll have to understand how computer processors work.

Processors comprises of many transistors. Technology is advancing to include as many transistors in the chip as possible, hence the nanotechnology.

You can easily google up information for the number of components being integrated to a single motherboard chip.

What's the main concern here (in the perspective of pc technology) is not to decrease the size of the pc, but rather to decrease the size of components.
This then enables them to 'stuff' as many things as possible for the same dimension of pc.
No you can't crap here. Please contribute something useful towards the discussion