Sharp PC-Z1 NetWalker Mini Netbook Hands-on

The PC-Z1 NetWalker by Japanese electronics manufacturer Sharp is a mini-netbook with a 5" touchscreen (1024x600px) display that runs Ubuntu 9.04 or more precisely Ubuntu Smartbook Remix with a custom user interface adapted to the small size of this mobile device.

The Sharp NetWalker is powered by an 800MHz Freescale i.MX515 ARM based CPU, has 512MB RAM, 4GB flash memory with microSDHC expansion for another 16GB, 802.11b/g WiFi, and 2 USB ports.
As you can see in the video recorded for Netbook News at IFA 2009, which currently takes place in Berlin, Germany, the 68 percent of a full-size keyboard is not suited for normal typing with 2 hands. Makes me wonder about use cases for this device in its 10 hours of battery life, as claimed by Sharp.
If you owned a Sharp PC-Z1 NetWalker, which is currently only available in Japan, what would you use it for?