The personal hotspots are made possible with Sony's own Share My Connection software. Note that a subscription is required, unfortunately), but you can set up a network wireless access point that can accept up to five other Wi-Fi enabled devices to connect.
As for the computers themselves, the lower-end, 13.3-inch Y Series is targeted towards a youthful, student crowd. Laptops are available in five fun hues (black, teal blue, pear green, fuchsia and violet), and should fit easily in any knapsack with a 1.2-inch profile frame.
The 13.1-inch Z Series is for a more professional crowd, probably those who travel around a lot on business and want to connect gadgets quickly on the fly. Packaged in an aluminum casing, the notebook only weighs three pounds and a decent max seven hours of battery life that should sustain you on a trans-continental flight.
Both the SMC-enabled Vaio Y and Z series computers are available for pre-order now, for $770 and $1,950, respectively.