I'll be really excited when they've scaled it down to the size of vapor. Then we can have REAL "cloud computing!"
However, this isn't really a computer, as it still needs a power source and I/O. It's just a small wafer of etched silicon until it has those things.
If they used this as the basis for an environment-powered computer and it contained bluetooth and/or WiFi capabilities as well as decent storage, this could be interesting. Get a bunch of these self-powering in a mesh network and you've got something interesting.
To self-power, they could just stick some PV chips on top. For WiFi, use the new quantum-state on-wafer antennas. With these two things on board, you've got something that has a power source, a sensor, and data I/O -- it can truly be called a computer, and a handful of them could be programmed to do all sorts of things (distributed streaming video camera, security system, control any other device that requires motion/light sensitivity, etc.).