This is an amazing step and the transistor density chart shows you just how big a deal this is. 1/3B transistors per square mm. Now for 'grins' take a piece of paper and make a 2 x 2 mm square on it. Now figure out what you can do with 1.3B transistors in that space. Based on this[1] you are looking at a quad-core w/GPU desktop processor.
Of course you aren't really because you cant fit the 1440 pins that processor needs to talk to the outside world. But it suggests to me that at some point we'll see these things in "sockets" that connect via laser + WDM to provide the I/O. An octagonal device with 8 laser channels off each of the facets would be kind of cool. Power and ground take offs on the top and bottom. That would be some serious sci-fi shit would it not?